Just an FYI, They now have root for the Evo 4G Gingerbread with the new bootloader (hboot 2.16). If you're like me and had to get a new Evo because your old one bought the farm, and it came loaded with the hboot 2.16, you were SOL. But now you can be FREE again
Thanks to Revolutionary for finding the exploit, and thanks to ocnbrze for making this quick rooting guide.
Here's the link:
Guide to rooting Gingerbread with Revolutionary - Android Forums