I was sent a very polite email a while back from an e107 user who asked if there was a phpBB theme available as he was using it as his forum in a wrapper and wanted the rest of his site to look the same, I finally got around to putting together a phpBB theme and here it is if the rest of you want it.
e107 is open-source and of course, free. None of the developers of this software are paid, but donations do help to cover our monthly dedicated-server costs. If you like and use e107, please consider making a $5 monthly donation. Every little bit helps and is greatly appreciated. Thank you.