This is really awesome. I have several thoughts to point out:
1. Why 'TOP TECH NEWS PAST SEVEN DAYS' is only gadgets? I only see tablets, iphone, android etc.
2. Why do you limit to only 3 top news. people may want to see more with just a small more>> link.
3. Windows 8 Tablet Appears Next Week (wired),
Samsung’s New Windows 8-Powered Tablet May Debut As,
Samsung to show off Windows 8 tablet next week <-- those are aggregated as "Tablet Next" instead of "Windows, Tablet" I think.
4. In 'PRogramming' tab, we don't see buzz news, instead we only see categories like Software Development, Android, Software Developer... I know that it is difficult to fix this but just wanted to leave it here.
You can make this fantastic by continuously improving. Keep iterating. Read on topic extraction articles or papers to improve accuracy.