Regarding SVG, Olivier Galibert added caching, and now we're able to render them at high resolution without much slowdown(probably a hiccup at the start). This is in latest GIT, not 0.173.
And regarding MAME 0.173 http://mamedev.org/?p=425 released today. Here's a quick list of new handhelds added: - Tiger Copy Cat (2 versions) - Spelling B (1979 version) - Konami Gradius - Konami Lone Ranger - Nu, pogodi! (not finished emulation of this yet)