I've been distracted away from any productive AbiWord hacking in so long... The good news is that some other projects got a bit of help along along their periphery.
Was able to write GIMP plug-in loaders for the JBIG and SWF formats. The SWF plugin lets you load any frame from a SWF movie, optionally scaled/otherwise resized. Why open Flash movies inside of GIMP? I dunno. Boredom, I suppose :)
Also thinking of writing a RSVG plugin for Moz. Its builtin SVG support shows promise, but (at present) leaves much to be desired. Yeah, RSVG needs a lot of work too. I'll see what I can get to, now that most of the Sodipodi Flags work properly.