I was at Joanne's Superstore today (in Buena Park, CA) and they do indeed still carry the long loom series and the round loom series. So I guess it's really catching on. Which means you can grab one of those 40% off coupons and save some money on the set if you time it right.
I wrote a tutorial for the Knifty Knitter Long Loom Series and posted it here: http://hubpages.com/_l6f64eotqm13/hub/Knifty-Knitter-Long-Loom-Series There are lots of photos to help you figure out how to use the longer looms.