I have the basic isl 6-330d which has 2 charging outputs. I believe there are a few different types for each model with pc interface and software upgradeability. I have seen the really expensive isl8-936.
As 65535 pointed out, rcgroups.com is a source for more info and feedback on the Schulze chargers. I visited the site before buying my Schulze.
6-330d is a nice charger, if you get the newest firmware - 8.50 is also handles the A123 cells. Its also easy to add a backlit display. If you want a charger that really does get lithium packs to 100% charge everytime this is one of the best.