http://www.youtube.com/watch?v=3V178qF9NOg
This video is the result of my effort to use the Alpha's keys in they way they were intended. All the sound is generated by one patch in Massive, and with a combination of velocity, aftertouch pressure and the key's sideways axes I can get at least 4 distinct sounds out of it without taking my hands off the keyboard :D
I've found that a good way to make huge patches like this is to find a complex and evolving synth patch with lots of modulation (LFOs, envelopes etc.) and to remove all the automatic modulation, instead attaching everything to the keys in some way and then playing it in realtime.