I stumbled on a place that I think I might use to offer up my remaining Gmail invites GMail swap - A cute little idea for matching up folks who have invites with folks who want them. A few wanting invites are offering things like the secret of life and cute cat photos. I saw one I can't find now offering air. But there are some other swaps offered too, like a Swiss tour guide or Orkut invites.
Thanks for the find go to Anne at California Bloggin' v3.0.