I honestly have no idea if it's not Resume and you don't have anything set to open on startup. Resume was the likely one, you could try as Currawong said and check to see if anything is in the login startup programs.
I didn't have any related problems, but my whole machine was running pretty bad before the update, and worse immediately after, so I did a fresh install of Lion (made an install disc from the update app's files), and have not had a problem yet.
Because of the fresh install, there is nearly nothing in my list, but my "Login Items" are:
iTunes Helper
BetterTouchTool
gfxCardStatus
The only thing directly related to iTunes itself probably should be that one or third party things related to it you set to run on startup yourself. Vuze and VLC should probably not have anything there for any reason.
If nothing works, and you are unwilling to do a fresh install (I would have been if I had anything actually important on here that wouldn't fit on my other drives), you might want to just wait until the 10.7.1 update to see if it is just a weird Lion bug they haven't fixed yet.