I've been running SpamNet for a few weeks now. It caught 3,827 spams out of 6,029 emails. I just discovered it has a whitelist of addresses it shouldn't consider as spam (so at not to accidentally list friends as spammers), but its implementation couldn't be cruder. You have to manually type each address you want to whitelist. This should work right from the inbox (as a third toolbar button), as well as from Outlook contacts. Well, this is still a beta, besides its free.

Can I brag that SpamNet works rather well and this is an idea I pondered more than a year ago, while they still weren't known from the public nor me?