Anyway, the service is on an invite-basis only. However, you can now get free invites through this secret link:
Once that page loads, click "Join!" on the top of the page. I believe there will only ba limited number of free invite codes given out through this link.
I'm a real big fan of NuTang and have been promoting for a long time. You get unlimited entries, unlimited photos, 100% customizability, forums, and so forth. Plus, it has a very tightly-knit community feel.