Here are some links to the web pages of various humour lists, and to other humour pages:

The Oracle Service Humour Mailing List Web Page

An EXCELLENT mailing list. You can find links from this site to many other humour pages.

The E-Funnies Mailing List

E-Funnies is another message-per-day humour mailing list.

Best of: Humour Mailing List

Maintains the unofficial 'Little Johnny' list on the web. Another excellent mailing list.