Well coming in late on this one too. Some people should check there facts before spouting off.
The Iroquois UK web site is actually on two sites as I understand one is orphaned and has no access by former owner and the other is almost non active. There is the Delphi forum and a new group on Yahoo.
IroquoisCats : Iroquois Catamarans
Having just purchased one I think they are a great boat and will suit my needs well.