At the moment, as you've probably noticed, you can only put plain text in the site, with some limited HTML. Hand typing HTML isn't even my idea of fun and I'm a nerd.
One option is to put a WYSIWYG editor in, but I've tried two so far (FCKeditor and TinyMCE), which work a bit like some sort of Word-lite editor -- highlight text and click buttons for formats, links, etc. However they seem to be a bit complex to get working, with a lot of messing around with config and stylesheets etc.
Alternatively, I can put in BBCode support, as used by various web forums like BriSkoda and BETEO. This is a sort of simplified HTMLish syntax, so for example, [b]bold[/b] and [url="http://www.fscked.co.uk"]Richard's homepage[/url] and [img]http://somewhere.com/something.jpg[/img] is how you do bold, links, and pictures. This would come with a little toolbar over the top of the input area to insert the tags for you.
Which option would people prefer? The BBCode one is easier to implement, I think, but is slightly less easy to use.