thanks for the reply but (luckily?) cooltech wanted to be nice and upgraded me to the maze4 gpu block since they didn't have any more swiftys in stock. hopefully i can finally get this watercooled setup by the end of this or next week -- dtek says they finally got the right parts for the WW and will start shipping to resellers (ie: cooltech) monday.
bruce was able to get in contact with danger den and says the maze4 gpu block should fit the gf4. i'll find out when it gets here along w/ the WW