1. Plugged: The Unofficial Homepage of Paul McCartney.
This webpage is fantastic and is without doubt the best that I have seen yet on McCartney.
2. Paul McCartney's Official Homepage.
The "official" homepage of Paul McCartney.
3. The Beatles: Guitar Tabs.
These are some pretty good - and easy - arrangements of Beatle songs for guitar.
4. Bagism: Another excellent webpage on Lennon and the Beatles. Definately worth checking out.
5. Kevin's Beatle Archive: Another excellent site on the Beatles.
6. New Mary Jane's Dream: This is an excellent website on the Beatles and John Lennon.
7. Echo's Paul McCartney web site: An excellent tribute to Paul McCartney.