Oops -- I didn't include a license. The css file is automatically generated by SimpLESS and I forgot to pop it in (sorry). I have updated the dropbox file to make the theme.css include the license text. It's still Creative Commons and I don't care about personal recognition. You can remove my name from anywhere it appears and do whatever you like with the metro code.
Use, abuse and, if you produce something you think is particularly neat, please post it on here (or not -- whichever you prefer) :-)