Thanks for the responses. Confirms what I suspected.
The project is for our own version of a guitar effects pedal controller. Originally inspired by this: http://www.geofex.com/article_folders/rmtswtch/rmtsw.htm
, but after all of the changes / features we keep addining, it only has a slight resemblence to the original.
Right now we are at 44 input / outputs (LCD, LEDs, Stomp buttons, relays, etc...).
He is talking about some more features that could add up to 12 more IOs, so we are filling up the mega pretty fast.
We have tested all of our needed programming and electrical proofs individually, and did a small scale test of all our programming concepts combined on the uno (used all the digital IOs).
We now have a mega, and have ordered all of our parts, so hopefully in the next few months we will have our prototype up and running.
We also made our first PCB (acid etched a copper clad board). So that is one more thing to check off our list of things we need to be able to do.
There are a few friends who say they want one if it works like we think it should (plus my son has dreams of selling some - we will see about that way down the road).
Thanks again for the help,