[SllX]

I know this is unsolicited and I apologize for that, but check your Console logs immediately after you boot back up if you haven't already, there might be a hardware issue, and you ought to be able to get a good idea of what's going on by seeing what kext is affecting it.

My current and previous laptop have been fine, but I used to have issues all the time on a much older laptop, and the issue back then, I forgot exactly which piece of hardware it was, but there was a bug in one of the drivers that was patched in an update, I think it was 10.4.9 or 10.4.10 that had the issue, a known issue at the Apple Store; but they couldn't do anything about it from behind the Genius Bar. Generally if you're getting kernel panics though, there's either something wrong with a piece of hardware or with the driver for it, although it could be any kind of kext causing the issue if you have any 3rd party kexts installed.