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We're giving away invites to social sites. Next up: Spock, a social search type thingy.
If you'd like access, post your email address in the comments of this post. Or if you want to protect your email address from spammers, grab a temporary email address from Spambox.us, post it here and then add your real email address as your primary address once you get into your Spock account.
We'll send invites to the first 3 people on the comments thread: those people must invite at least 3 more people and so on. Once you've sent an invite to someone, reply to their comment with a phrase like "invite sent to Bill". Due to the way Spock works, you'll also need to provide your first and last name in order to get an invite.