Indeed. This is the entire concept behind Inky's Smart Views. (http://inky.com) Still beta; we're focused on stability and bug fixing.
On the note of smart views, any idea how representative my data is of the typical email user?
Separately, I'm curious to know how far smart views go with aggregation - i.e. if I get 10 facebook friend request emails, are they combined? Or is this an irrelevant question in the smart view paradigm?
The smart views continue to evolve; we've been iterating them to find the right model -- it turns out to be pretty subtle from a UX standpoint. That's another reason we're not formally launched yet.