Thank you for the suggestions on what to do on the Pomatos. Heh, signature orange toe. I would feel better about doing that if I hadn't already finished and woven in all the ends on the first sock. Also I might be more inclined if I happened to have some complementary sock yarn lying about, but I don't. I may just suck it up and buy another skein. I can always just make another pair of socks, some plain vanillas that don't slurp up as much yarn as do all those twisted stitches in the Pomatomus.
I'm flirting with an idea right now of making a need yarn/got yarn website. It would superficially similar Good Yarn Karma, but allow you to post requests for specific kinds and dyelots of yarns that you needed. The site would also also allow people to offer extra partial or odd balls for swap or payment.
The site would be MUCH less hands-on than Good Yarn Karma, as I don't have that kind of time in my life. Instead of a blog, it'd have a more automated format: submit a request or offer by form, then let people respond to that request or offer. The site also would NOT be involved in arranging and guaranteeing payment and shipment -- it would only help connect the yarn-less with the yarn-enabled, who'd then figure out their own exchange. There'd be a search functionality so you wouldn't need to comb through all the posts to find something.
It'd be somewhat like the skein list that yarn store owners keep. The goal would be to connect people with extra skeins with people who need them. I see requests all the time for needing just one extra or partial skein of X in dyelot Y. What do you think? Would such a service be useful? Or would it be unnecessary or easily abused?