tor and privacy

[Technomage-hawke]

given recent events in the news (the CALEA and other points),
it has been suggested (and I am doing this myself) to setup tor nodes 
(tor+privoxy) for use in keeping browsing and other web related 
communications a bit more private.

the suggestion is this: have a lot of plug members setup tor exit nodes to 
share in this capability (and speed up the tor based network a bit).

what say the rest of you?