Thanks for the input, bro! The 802.11y is an interesting choice, though I kind of worry about it's power consumptions. We will compile all the possible technologies soon and see their pros and cons.
Raj, which CAD software do you use at your uni? Can you try out your wheel and chain idea and post it here?
Me still a rookie when it comes to CAD, hehe. Today I was testing out different softwares that are freely available on the net, so we can easily share the data files.. wasn't really aiming to design possible ideas yet. You know any other good free CAD software? I might try BRL-CAD out.