Gmail - Inbox
Very little spam gets through the gmail spam filters now. The number in my Spam box is falling. I decided not to empty that box, because:
1. Google doesn't provide an easy way to empty it.
2. I've hunch they weight their spam filters based on what's left in the Spam box. It's what I'd do.
So they've got a handle on the problem now. Yay for them!
Update: The spam folder has dropped from about 1500 entries to about 200. Gmail's antispam technology has really kicked in. I get almost no spam.