[snip]

An integrated arpeggiator would be fun! There are some external midi 
arpeggiators that might work, forgot where they are though. 

  

Actually, that would be wonderfull. The general idea is too have a sort of verry small 'patern' of notes that can be played on different tones.
I can record examples of the arpegiators in my MC505...

As for pattern based sequencers, isn't seq24 pattern based ? Softwerk is but I 
don't think it's anywhere near complete...
  
I looked into that, Softwerk that is, I never really got it compiled, too much errors.
It looks great though, very 'hands on'.

regards,
Wim VW