Bump a lil?
My experience so far with arduino is:
4x servo insect that could walk back and forward and turn (although not with real time commands)- easy peasy
Blutooth over android phone (measuring analogue sensor value)- more difficult.
Moving one stepper (various movements) with this driver http://www.ebay.co.uk/itm/271028220388?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649, so how come this driver wont work?