I blogged about this last year, but I just realized I never mentioned it on the mailing list. I've been working on UI improvements for Roller using the Twitter Bootstrap libary and I'm doing it the branch 'bootstrap-ui' and plan to mege to master when I'm done (hopefully later this year).
You can find more info here: http://rollerweblogger.org/roller/entry/modernizing-the-roller-ui And you can find screenshots here: https://www.flickr.com/photos/snoopdave/sets/72157666773620323 I've been making slow but steady progress and am about 50% done. Dave