I can't post in my forum... erm... why?
Like, it just doesn't say "post topic" or anything. Do I need to have my homepage active to do that?

First you have to make a few sections in your control panel. You know, with titles and descriptions and stuff.
Then when you go to your forum, just lick on the names of those subsections to go to them and then you can post in them. You can't post at the top level of a forum.

haha... thanks...
now I'm embarrassed, that was really simple...
*hides under rock*

Don't worry about it, I was confused exactly the same way. :)