[joelg236]

Two things:
First, developing robot code (assuming your using wpilibj) on a phone would be super tricky, seeing as the projects depend on the plugins being installed on Netbeans.
Secondly, I would highly recommend NOT using dropbox to share code. It is very easily prone to mess a lot of things up. I would say to use git or svn, depending on your needs. Github is a great place to host code repos (or google code, that's good too).