I'm looking to install a fan controller guys and must admit I'm not entirely sure what is involved.

I have found this: http://www.overclockers.co.uk/showproduct.php?prodid=BB-007-SY&groupid=701&catid=57&subcat=189

looks pretty good i think lol.

What kind of connections will it require? I know all my fans are connected via molex and have their own tri-switches on them. I'm assuming I will have to do a small bit of re-wiring?