bleh, markdown. can we not? I don't like how it uses standard characters as the formatting code. Something like vb tags lets you specifically denote which text you want to modify (eg: [b]bold[/b], [i]italics[/i], [s]strikethrough[/s], etc.) instead of accidentally making something italicized because you put asterisks around a word suggesting emphasis. You can't enclose words in asterisks or tildes or underscores without getting some fucked up text effect you don't want.

Custom CSS for each forum is in the planning too.