I'm still reviewing comments and sending out invites to new followers, sorry you haven't received one yet! We opted for a private beta in short waves so we can learn more about our users and address their early feedback. I wasn't able to find your email so give us a shout if you're still interested. Click the "Contact" link in the footer. Thanks!
You should let more people try it even if it means stumbling upon a few bugs than to turn away people who are genuinely interested in trying.