I've written "iHighlight: Source Code Viewer" app for iOS (both iPad and iPhone) which is syntax highlighter of 30+ programming languages that uses Dropbox to sync files and has other useful features such as 16 syntax themes, fullscreen mode, importing files from other apps and through iTunes, adding files to history and favorites.

Get it at http://itunes.apple.com/us/app/ihigh...486503829?mt=8

Sincerely yours,
Dmitry Afanasyev,