Skitch - One feature I would love to see

Skitch is already an amazing app, I love it.

One thing that would make it even more killer is the ability to do a screenshot within a scrolling region. For example, to capture an entire web page.

SnagIt on Windows does this and it's exceptionally useful--unfortunately, nothing on Mac does it as nicely.

It would be a nice addition to Skitch's already awesome feature set!