People have been auctioning Google gmail invitations on eBay. Jonas has set up a gmail invitation exchange for people who donate invitations and for people willing to do something "good" in exchange for an invite.
JonasIt's not free, however. If you're interested in one, comment here and let me know what you're willing to do for it. Not to me (though I am more than ready to trade for a few good massages), but to someone else. A random act of kindness, maybe? Work in a soup kitchen? Help out at a needle exchange? Or maybe you're doing that already - you'd be the ideal recipient.