[SunkenCiv]

Here are three time travel methods, although they only go in the direction we're used to... ;')

http://www.ecardtricks.com/mr1.htm

http://mathematics.hellam.net/maths2000/trick.html

http://milaadesign.com/wizardy.html

[Daffynition]

Heh.

[RightWhale]

J. Richard Gott is a good one. If there is an expert on time travel, he is it. Michio Kaku is a lost cause.