if you don't mind, i'll move this post over to the board FAQ section.
basic stuff: you should be able to click on "members" to see how many people there are, and if you sort by post count, you'll get an idea of how active people are.
people who have chosen to identify as "top" or "bottom" have their names in different colors: purple for bottoms, blue for tops. you can access that somewhere in your user control panel, and *should* be able to sign up for one or the other (or i suppose both). your name changes color if you make one of them your primary identification.
kinda zoned right now, but hopefully this answer will give you the tools to answer your own question.
