Do what every great car company does, reverse engineer a robot!!
Your probably thinking "how do i do this?!" what i'm doing right now is finding robot CAD files on here(CD) and at
http://frc-designs.com/html/2011.htm, now remember none of these robots come with mates, so take it apart and learn how it goes together and how it works! Like 148 and 33 have there main robot it 1 assem, with multiple sub assem. Looking at some of these robots is great CAD practice and a great way to learn about common FRC mechanisms!!