Damn, this sucks, another one.
I too had Win 7 without SP1 on there.
I'm wondering, were you also running RDP or VNC services? VNC for example could've been cracked if you had an easy to guess password.
Try running a bunch of online virus scaners like bitdefender, f-secure online scan, eset online scan, panda activescan...
Run spybot, malwarebytes..and last but not least combofix in case you may have a rootkit. Either way dude I strongly recommend you format, reinstall get yourself a legit copy of Win 7 if you don't already have it and update to SP1. Also if you are inclined to learn a bit about linux setup a dedicated linux box to store your bitcoins on. At the very least run a Linux install in Vmware or something.
No VNC on this computer, however there are other computers on my network with VNC servers running.
Ill just reformat. Copy my steam games to a flash drive and make good use of my 4G phone....
I have a legit copy, funny thing is I got it in the big "Windows 7 Launch Party" thing. Sent out a shitton of win7 stuff, bags, shirts, and a copy of Win7 Ultamite

basicaly a raffle. So maybe this is my luck evening out? Who knows.
I dual boot Linux (Ubuntu) on this computer. Maybe that will be my main OS now (i cant believe I didnt use that OS as my bitcoin wallet holder D:).
Thanks again
--Dylan
Yeah tell me about it. I've been kicking myself over not doing that. Really the only thing I should've been using windows for is gaming and running trading applications, the rest Linux can do almost anything Windows can now.
The only thing that I suspect at this point is some virus. Also that namecoin binary seems interesting because I too ran a namecoin binary two days before I got hacked. I wonder...hmm...
Before you format make a vmware image (or whatever other imaging program you prefer) of your running system - for forensic analysis. Get in touch with the major exchanges and report your coins stolen. They will need some hardcore proof but if there is even the slightest chance of gaining them back I'd say it's worth it.