River Song is the TARDIS

I was ranting and raving at about 1:30 in the morning last night after rewatching S6E2 (Day of the Moon) and seeing S4E9-10 (Silence in the Library, Forest of the Dead) for the first time.  Who River is has been bugging the crap out of me and I spent this evening thinking about it and she has to be the TARDIS.  There's so many things saying yes, and I'm not the only person who's stumbled on this theory.

From Greywulf's Lair:

More accurately, she is the TARDIS from the future (after... y'know... that THING happens) regrown from Amy's Ring. That's why she can fly the TARDIS, write Gallifreyan and keeps a dairy (her "memory bank") that looks an awful lot like the ol' Police Box. As she is regrown, her Chameleon circuit is working too, which is why she looks amazingly like Alex Kingston. And yes, that does mean that River Song is bigger on the inside than she is on the outside.

 Don't go there.

 Want more proof?

Add an L from somewhere (I'm sure they'll invent a middle initial or something) and River L. Song is an anagram of Lover's Ring. Ok, it's a stretch, but worse anagrams have been made in Doctor Who :D

 In this episode she says to herself "Oh Doctor. It's amazing I let you out" - something only the TARDIS can say!

 The TARDIS is The Doctor's constant companion, friend, ally, and has proven time and again (no pun intended) that she is utterly devoted to him. In a way, she IS his wife. The TARDIS has demonstrated her ability to create Sonic Screwdrivers which explains how she got one in Silence in the Library.

 From Scott at Iceburg Ink:

Well, it all started with hearing about the Series 6 episode that Neil Gaiman has written called THE DOCTOR’S WIFE in which the Doctor finds himself in a spaceship graveyard and the rumor is that Suranne Jones who plays a character called Idris (TARDIS sounding ain’t it?) is actually the Doctor’s wife. Who could BE the Doctor’s wife? Why his TARDIS of course! He loves his ship. Loves it. Calls it sexy at times.

-River carries with her a diary. A blue one cut with the panels on the cover to look like a TARDIS. 

-She knows the Doctor's true name! 

-She also carries a sonic screwdriver that looks like Ten’s sonic. 

-She at certain points has had Jack Harkness’ wrist-time-traveling device, an item the tenth Doctor confiscated for a time. An item specifically made by his people to police time and could not be gotten by her any other way than being in (or part of) the TARDIS.

-She also carries the Squareness Gun, another item once owned by Captain Jack Harkness and confiscated by the Ninth Doctor (in the Moffat penned episode from Series 1, THE DOCTOR DANCES) and likely then resided in the TARDIS. 

-She can fly the TARDIS by herself (a feat the Doctor can’t fathom), knows where the blue stabilizers are (another thing the Doctor didn’t know about), and can land it without the brakes on (the Doctor always leaves the brakes on resulting in the telltale VWAARP VWAARP sound). 

-She has been in the TARDIS during two different occasions when the TARDIS was in mortal peril, once in the loop at the end of the series 5 finale, THE BIG BANG and survived. 

-When the Doctor meets her again in the Series 6 opener THE IMPOSSIBLE ASTRONAUT his first words for her are “Okay, what have you got for me this time?” the very same words he spoke to the TARDIS when standing in front of it after it regenerated itself during the Series 5 opener THE ELEVENTH HOUR. 

-In THE PANDORICA OPENS when River sees Amy's raggedy Doctor dolls in her house she says "I don't know why I ever let you out." Think about that statement...really think about it. 

-He always refers the TARDIS as she (but all captains do that about their ships so that may be nothing) 

There is also the other theory that River is Amy’s future daughter (Amy has preggers stomach pains in THE IMPOSSIBLE ASTRONAUT and River seems to have phantom sympathy pains) and that the man she kills is Rory who would be her actual father. But that one is an even wilder speculation than my above nonsense.

 From Bullet Point Ballet:

There are all kinds of little events that have happened - specifically, when Churchill tries to call the TARDIS and the phone rings for her!

5/14 EDIT: Upon airing of "The Doctor's Wife" and the line, "The only water in the forest is the river."
From JoeUK on Gallifreybase.com:

I think we are now looking towards River being the TARDIS: 

1) He calls the TARDIS "sexy" 

2) The epsiode is called the Doctor's wife, and most evidence points towards River being the Doctor's Wife 

3) This would also allow the time-girl to be River and regenerate, it is not inconceivable that a TARDIS in a flesh body can regenerate! 

4) Would explain why River can speak High Gallifrean / Pilot the TARDIS / understand Time Lords so well.

I suppose the only hole is that River talks about the Doctor picking her up and knowing all about her when she doesn't know anything but that could also be to throw people off. We know it has been said that River isn't who we suspect her to be, I just think that her being the plain Doctor's wife is far too obvious for Dr Who!

One thing I know I want to add - River is the one who told the Doctor the doors to the TARDIS would open if he snapped, if her Doctor snapped.  Sure, she's seen it traveling with him, but how did he start snapping in the first place?  Because she told the 10th Doctor.

So there you have it.  They'd already said it and saved me the trouble of typing it all out (though formatting that was annoying) and probably said it better than I would have.  But such doesn't detract from the strength of the evidence.  River is the TARDIS.  Keep watching.  I'm willing to bet this will turn out true.