Here's one with lots of reading material:
http://www.i-a-r-t.com/
Here's another: http://www.superslow.com/
Google search on "super slow", and you're on your way.
And yes, I'm quite happy with the results. And also with the amount of time needed to get them. That's nice - 20-30 minutes, once or twice a week, and you're done.