I'm unsure how adiumxtras formats HTML in the comments, so I've sent an example to your gmail.

The styling or something for /me (emote) commands appears to be missing... what I get is:

%username%%message%

basically, there's no spacing between the two values. Also most themes tend to style the /me style commands a little differently so that would be nice... but hardly required. I can point to a screenshot if this description doesn't make sense. If prodded I could turn on the web inspector and look at the markup I'm seeing as well...