Het Swap Exchange

While I probably wouldn't request or offer it, I like the idea of opening up to other mediums - it lets more people participate, and the more the merrier. Looking at some other exchanges with a 1k word count minimum for written work, WorldbuildingEx used "a finished piece of art, not on lined paper, with a total size of 400,000 pixels or more" as their art minimum; Rare Pair Fest required "computer- or hand-drawn and must be complete (no rough sketches)" for art; All in the Family required "a finished piece (not on lined paper)". (AitF also allowed vids, so long as they were "a minimum of 1 minute long and complete".) Based on those, I'd say "finished, not a sketch, not on lined paper" sounds like a workable art minimum equivalent to 1k.