Yea rob, apparently its in HMV at the mo on blu ray for £7.99, bargain.
Yea Jo, apparently there are 3 parts in total, 2 is due out this year some time i believe.
I also have watched it quite a few times, think the film is awesome!!!
This is an amazing scene, where he fight 10 black belts.
http://www.youtube.com/watch?v=3qhPDEOYbx4&feature=related