I just rsynced up my presentation on linking manuscript images to transcriptions using SVG for Balisage, that I gave this morning. It's at http://www.unc.edu/~hcayless/img2xml/presentation.html. The image viewer embedded into the presentation is at http://www.unc.edu/~hcayless/img2xml/viewer.html. Text paths are still busted at the highest resolution, as you'll see if you zoom all the way in, but apart from that it seems to work.
Balisage has been a really great conference so far. I highly recommend it.