If you register now, you get this amazing...um...okay, there is no promotional item for registering now. But membership fees go up June 1, and if you register now you will get a concom that can plan for a larger attendance! Also if you are an interesting person who could talk on panels, then registering now will let the programming people know that you can be put on the said panels. Which is useful for planning and stuff.
There will be new cool people this year! Sherwood Smith and Doris Egan and...okay, I don't entirely remember who I've seen at 4th St. before, so I'm not sure who I can claim as new. But there will also be some familiar faces of great interest. Hurrah for 4th St.! Buy one today! Or something.