Seems like everyone and their dog has gmail these days, yet sites like gmailswap still have tons of people clamoring for invites with almost as many people just trying to get rid of the darn things. Well, for those who are tired of seeing the "invite a friend" link everytime they check their mail, I've come across an easy way to get rid of them: http://isnoop.net/gmailomatic.php. Since I think virtually everyone I know with any interest in gmail had it before i did, i will continue to distribute my invites this way. If by chance you read this (haha) and you're looking for an account, go to the page (see above) and you should be rewarded.
Basically you send your invites email@example.com and they get added to the available pool immediately. From there a user who wants one just submits their email address and receives a free invite.