I'm going through the pains of configuring this, as well.
I find that it's working fine, I just need to figure out which MIDI notes to assign to each of the pads - default settings make this way off on Bank A and slightly off with Bank B.
MacBook Air 1.6GHz 2GB RAM, New iMac Core 2 Duo 2GHz, 4GB RAM, OSX 10.5.4, Live 7.0.9, Nord Stage 88, Korg Karma, Synclavier II & 3200, Waves SSL, etc.