Wired News: Gmail Invitation Prices Crash: "The bottom has fallen out of the market for Gmail invitations.
On Monday morning, invitations to join the testing of Google's Gmail Web e-mail service were still fetching as much as $100 on eBay closed auctions. By Wednesday afternoon, sellers were lucky to crack the $20 mark.
Increased supply is the likely cause. Until now, Google has been relatively stingy with new invitations. But the company seems to have opened the floodgates. Several Gmail users reported that they had received six invitations over the past two days. "
I found 3 more "invite a friend" accounts in my Gmail this morning (already spoken for...)