http://www.d.umn.edu/~bold0070/spymac_m ... ments.html
I was doing a little research trying to find some new instrument packs for Logic Express and I stumbled across these. There's like 100 free (and royalty-free) instruments on this guy's site. He does ask for donations, and I know if I end up using some of these in public I'll definitely be doing some donating myself. If you're using GarageBand or Logic, you really owe it to yourself to download these and at least audition some of them. In particular there are a couple of grand pianos in there that sound better than even the EXS Grand Piano that comes with Logic Express 8.