I never thought I would have a use for all of those outputs on the MPC but now I use them for bouncing audio to and from my Microsampler and 404. I have outputs 3 & 4 sending to the MS and the MS outs going into the ins on the MPC. That way I can add MS fx to any sound without danger of a feedback loop--- just switch the MPC program's pad to send out 3/4, add the fx on the Microsampler and just sample it again on the MPC! piece of cake... I also have outs 5 & 6 going to my 404. The outputs on the 404 are routed to diff channels on my 4 track just so I can hear it. I can't instantly sample back into the MPC because the Ins are in use by the MS, but a 32MB card can still be read by the MPC even if the card is formatted for the SP. Boom!

Maybe you guys are already doing this but just thought I'd share.

i think i could try this also with my mc909, cool!