(Apologies if it was mentioned on this list before; I couldn't find a thread about this.)
Over a month ago, an equipment exchange forum has been started on Wikimedia Commons at http://commons.wikimedia.org/wiki/Commons:Equipment_exchange, aiming to be a place where "media contributors (...) can request, donate, sell, or barter equipment for the production of free content, including camera equipment, computer equipment, art supplies, and software."
I think it might be worth sharing this idea with the general public; please forward it to your local mailing lists if you feel it's worth the attention of your community. Congratulations to Derrick Coetzee (Dcoetzee) for coming up with this wonderful idea, and many thanks for his generosity towards another Wikimedia contributor (details on the page linked above).