Tim
On one of the other boards someone has been giving us info from the most recent Unofficial Guide which covers lack of EE and post 9/11 stuff - it's just come out in the States but here is what was posted - sorry couldn't remember how to do link:
MK: Sun & Fri are the least crowded in summer and Fri & Wed are the least crowded during the rest of the year.
MGM: Mon & Fri are best during summer. Mon & Tues during off season.
Epcot: Mon, Wed, & Thurs least crowded from Jan-May as well aas in Nov & Dec. During summer, smaller crowds on Sat & Sun. In Sept & Oct, visit on Sat or Sun.
AK: High or low season, Mon, Tues or Sun.
There's a note: If EE is revived, avoid the park running EE during busier times of the year. If you are a Disney resort guest, use it only during less busy times of the year. Avoid Sat. at MK regardless of the time of year
Hope this helps