I'm creating a new style for a site I help run, but it still looks kind of plain. What would you suggest for me to soup it up? Any suggestions are welcome ;)

SCREENSHOT (http://www.timetravelforum.net/so_far.png)

Honestly, it depends on what all you want to do with the style. I honestly think the style looks fine as it stands and I love the icons/logo set.

Sometimes plain and simple is just what attracts :). Simple, yet effective.

I would make the search bar a bit smaller, keep the length just not the width. You could add a cream color to add diversity to what tabs being currently viewed and what one isn't. You could also leave the background white. Other than that it looks great :D.