I've been hard at work on adding an OpenVG renderer to Gnash to improve the performance on the ARM. Currently on the ARM, Gnash uses software renderering, which kills performance. I've been doing this currently on a Babbage board using the ltib cross build system. The plan is to have OpenVG support in the next Gnash release, currently scheduled for Feb 2011 sometime. You can see my full notes on the progress of this work at this link:
http://wiki.gnashdev.org/Building_for_ltib.