You should give the 'About' a nice hover. Like the homepage maybe, try something cool!
It took some time before I understood that the text beneath the menu is the latest tweet, can't you edit the image and place on left top: 'Latest Tweet' ?
Why do the 'X Users Online' link to the homepage? It's better to link to nothing than
All other stuff looks pretty good, although that I'm not a big fan of the design But that's taste ofcourse
It has good informative articles so I'm sure if you keep it updated daily it could become a success Good luck with the site!