I'm personally fascinated by wikis and thought they'd be a good match for the collaborative spirit of the environmental art movement. Finding out it's a bit of a trick to get people to add to. It's so simple non-techies seem to fear it!
Part of BusManagement, although I haven't done much, yet. GreenmuseumWiki is part of the Eclectic Wiki TourBusStop.
I've been chewing on the idea of TourBusArt - a bank of images people could use in their wikis that served as public service announcements as well as just plain looking good.