Sorry to disappoint you but it’s a bit early for Windows 8 screenshots. We will try to get some as sooon as possible.
When Microsoft leaks some material we will probably get the first screenshots. You should definitely check out the Windows 8 features site to find out what they are working on. That might give you a clue what we can expect to see in a couple month.
Here’s a proof that there are no Windows 8 screenshots available:
Windows 8 Fake Screenshots by WinSpark