I like the dynamic style of the page, but I hate the color scheme. Blue and orange is OK alright, but only if you don't use five different shades of blue. Blue and orange only work together when they contrast, and using so many blues mutes out the contrast and makes everything look fuzzy.
The tagline would also look better underneath the Microsoft logo instead of besides it, it needs its own corner of the page, and putting the tagline besides it mixes it in with the rest of the design.
Also I think the bing logo makes things look worse, but because the bing logo is so bad. what are you going to do?