I have been messing with fins and fin placement the last few weeks. Most recently a twinzer setup that I wasn't impressed with, but you can read about that
here. Last evening I started a project to mold my own fins, in an effort to make them lighter, the details of that project are
here. Inland started making their own fins, I believe it was last year. They offered only 2 fins at the time. Jeff mentioned that they are offering up a number of new fin options for '09. Also, note the 4 skim in the one picture - it's a twin. I saw this configuration at the WWSC in '07 and then again at the TWC, it looks like that may be a production model soon.