Features
Bookmarking and matching
Add profiles to your bookmarked list for later ogling. If you bookmark someone who has also bookmarked you, you'll see this: 
We kinda play god a little
We delete profiles that seem creepy. No hard feelings though, we wish all the creepy people out there the best in their future creepy romantic endeavors.
The daily message limit
Everyone can write up to 3 new people a day. Choose wisely and make each message count.
(A note: once someone has written to you, you can write back to that person as much as you want.)
Keep an eye on profiles with RSS
RSS geeks can subscribe to a feed of newly updated profiles. Go to browse profiles, narrow things down by location, gender, etc, and then grab the customized feed. (What's RSS?)