UPDATE, 8/19: Wow – I got my GrandCentral invite from another InviteShare member less than 12 hours after signing up for the service! Can’t wait to pay it forward.

Original post follows:

InviteShare contributes to the community feel of Web 2.0 by allowing users to sign up for waiting lists for invite-only beta projects (a la Gmail, back in the day). Of course, once you get your invitation to your selected project and sign up, you’re expected to give back to the community by handing out any invites you accrue. It’s all very karmic.

Personally, I’m excited to try out GrandCentral, and the waiting list doesn’t seem too long (21). I’ve only heard of two other projects currently on the list: Pownce (think Twitter with file attachments) and Spock (a person-oriented search engine – I plan on blogging about this next week), so I’ll be spending some time this weekend learning about all the other offerings. I think this is a fantastic service that can really benefit “the little guy” – the tech enthusiast who doesn’t have the top-level access of more prevalent or established bloggers/”names” in the field.

Finally, in the spirit of sharing and community, I have a priority access code to share with you for MP3Tunes.com. This free service allows you to upload and stream your music files (MP3, AAC, WMA, OGG, and others), enabling you to listen to your collection from anywhere. It’s a tidy alternative to setting up your own server, and every new user starts off with 1Gb of space. All users are eventually upgraded to unlimited storage, but the code I have gets you an express upgrade (otherwise, plan on waiting 2-4 weeks from the time you fill up your initial 1Gb). It can only be used three times, so the first three folks who leave a comment here (with an email address I can send it to) get it.

And you lucky folks who get the code? You’ll be given three codes as well. Please pass ’em on!