Aside the comments above, i saw a few very minor flaws:
1, the topic bars are presenting a different shade of orange. Maybe it's just my screen (Laptop), but it appears as if the the bottom bar "What's going on" is lighter than the rest of the bars.
2, you have more real estate for your logo. Make it a bit larger, or better yet, include a graphic element.
3, your FavIcon doesn't match the post icons. This is really just a minimalistic thing, but for reasons of recognition and flow, i'd either change the color of the FavIcon or the color of the "new posts" icon and make them identical.
4, while the skin/theme looks great overall, it doesn't look like you've planned for any real estate for ads. Now, unless you're a Samaritan that doesn't like money, i think you should start building your frames for adsense and banner advertising, and start plugging some ads in. Make sure that the framework is just as rounded in the corners and flows with the design of the theme.
Other than that, great job, looks very polished.
IB