[Voltage]

Here are some interesting takes on killing spam: http://www.tmda.net/press.html

Its a whitelist with lots of additional features to make it more practical. I would really like to use it, but my cable internet provider seems uninterested..at least so far. Probably not enough complaints yet.

[zeugma]

I already do my own whitehat filtering. It has made a big difference to my inbox clutter. I almost never have spam in my inbox, though I do have to occasionally do a quick look at my spam folder to see if someone I haven't added to my filters yet has sent me email.

One interesting thing about manual whitehat filtering is that you get a good feel for how many people/orgs you are actually communicating with. I get so much spam now that it was almost impossible to deal with my inbox in an efficient manner prior to implementing a whitehat list. This is the down side of having the same email address for 6+ years.