You can find more than you care to read about seafoam here:
http://www.yotatech.com/showthread.php?t=35112
It's also discussed on "Bob is the oil guy." Do a search (sometimes it's "sea foam" and sometimes it's "seafoam") and a bunch of threads will come up. Lots of cleaners are discussed here.
http://theoildrop.server101.com/cgi/ultimatebb.cgi