What if my "A" doesn't equal 440?

The title to this post may be a little confusing to some, so here's the skinny.
The note "A" = 440 Hz. This is the the standard in pretty much every situation. When you hear an orchestra tuning up, before they all pick up their bows and start hacking away at the strings and tuning, the Principal Oboist will play an "A". Prior to tuning the orchestra, backstage where all the other orchestra members are adjusting their cumberbuns, the Oboist is tuning her instrument's "A" to exactly 440 Hertz, using an assortment of electronic tools. They all come out to their chairs, he or she honks her note, and everyone tunes. Now everyone's "A" is as close as humanly possible to 440 Hz.

Now that we've all had our Music Theory lesson, let's move on to my story. I did a stupid thing.

Two weeks ago I spent about 4 hours in the studio working on a very difficult accoustic guitar part. It isn't friendly. I don't even know why I wrote it...yeah I do. It's VERY COOL!! It really moves and it sounds simpler than it is.

I tuned to A at the beginning of the session, and for the remainder of the session I kept the guitar relatively in tune but not in tune with A=440. Oops. Over time, the overall tuning slipped until my A=337. I used the takes recorded at the end of the session...they sounded great! It was exactly what I wanted! Except...

Well, it became appearant last night when I was trying to record a counter-melody to the guitar that something was just slightly off. I used some tools to figure out what was going on, and BLAMMO! The number staring back at me was 337 Hz.

I'm far enough along that I do NOT want to have to go back in and re-record the whole freakin' guitar track. Truthfully, I don't ever want to play it again. I hope it doesn't become popular. :)

At least, that's how I feel right now. It'll pass. Besides, if it DOES become popular I'll just have another guitarist do it on tour.

So, do I go forward and alter the tuning of the rest of the instruments? Or do I go back in and re-record that stupid guitar part, playing until I can't feel my fingers? (I hate that part, when I've played so long that it feels like I've got mangled half-cooked pieces of bacon hanging where my fingers should be).

The lazy rebel (is that even possible?) in me says "Fuck it. Who says "A" HAS to equal 440 Hz?" And then I'll just leave it as is and move forward. It all sounds perfect, as long as everything is tuned to match the original guitar part.

Then the perfectionist in me pipes up (he's a persistent little bugger) and says I should do it over. I hate that guy.

I'll talk to Craig (the other guitarist in the band) and see what he says. Feel free to weigh in with your opinion as well...

Your friend and mine,

J