Spent a bit of time early this morning to knock out the most basic vector editing features in my SCI0 pic editor. The SCI0 pic byte-code is very terse; it doesn't even have closed polygons, just lines that happen to touch each other when rendered to the frame-buffer.
I'm sure this whole UI layer will need a refactor soon, but its definitely another step in a "useful" direction. Just a few core features left before a "beta" is viable.