I like how the pics page lets you see larger amount of data (pictures) at once than is possible just using Twitter, although you might want to check out the layout on that page in Chrome -- some of the text gets covered by ads.
Other than that, I'm not sure what the site offers me. Are the News / Tech / Gossip pages simply custom lists of people that are followed? Why do I want to use your lists instead of using my Twitter account, which I've already customized to include the people I'm most interested in following?
If your target audience is people don't twitter but might be into it, they're either going to end up moving on to actually using Twitter, or decide it's not for them. In either case, they won't keep coming back to your site.