Compiled libgnomecanvas and its bindings successfully (no errors or warnings!), ran a demo with it. Have yet to test text rendering or anything moderately complex with it, so cross your fingers. So far, though, lookin' gooood. It's compiled "native" (without Cygwin) so it'll be distributable without Cygwin.
Props to muntyan @ irc.gimp.org for guidance.
Details to come.