On April 15, the DualShock 3 (that’s the rumble-) controller for PlayStation 3 will be released in US. It will be priced at US$54.99. (Source: Joystiq.com)
If you can’t wait until then. You can head over to Play-Asia.com and order DualShock 3 now. This is the Japanese version, but it will work on both US and European PS3s.