I have just released the latest version of VPT for OSX and Windows xp/vista with lots of new features:
16 layers (previously 8 )
2 live sources (previously 1)
8 A-B mixers (previously 0)
greatly improved MIDI and OSC capabilities
monitor preview for 2ndmonitor (single screen, matrox 2x or 3x),live camera.
lot´s of bug ﬁxes and more efﬁcient code.
And as always, it is free.
The sourcecode is also included.
A new manual and video tutorials describe the new features.
VPT is released under a GPL license