Try these two: http://www.raycosoft.com/rayco/support/expect_tutor.html and http://www.csc.calpoly.edu/~dbutler/tutorials/winter96/expect/.

Both are rather basic, though. But since Expect is based on Tcl, it might serve you to check out this page for info on Tcl programming and tutorials.

I would also suggest checking out the Expect module