Well, it would be nice to not have to use the horizontal scroll bar to view code that is wider than the code boxes. :P Honestly, it sounds like a good idea. Try it and see how it goes at first.
That's neat looking. You could keep the transparent bar you have now at the top. The only thing that would change is the actual layout of the snippet page. If it's similar to that, then I wouldn't mind that.
I personally have no problem with Twitter. I have one myself, but I rarely use it. I find myself more prone to logging into Facebook, as I can communicate easier with friends on there. :P
I think that would be cool, I'm sure it'd be easier to see.