The Temp files are for burning/ripping, you can remove the temp files just DON'T REMOVE THE DATA FILES... if you do you will have to rebuild your library.
I have the same problem, there are nearly 1Gb of them (temp files that is)!! Fine, if I delete them, they will only build up again. How can I stop them being created in the first place??
Hmm, there aren't any temp files in my iTunes music folder. There used to be a few, but I deleted them, and I checked just now, and I haven't gotten any more. So obviously there is something that makes iTunes create these files...but what?
I have never used iTunes to burn a cd, so it cant be that. I have ripped things though. Its as if they are just not being deleted when they should be. However, I have deleted these temporary files + over time they re-appear (even when I am not ripping new cd's).