This one goes for the OMG/MDA-oriented developers, who will probably see this one quite interesting: There is a new open-source community available, so called MDA-Cartridge Source Forge Community, which works with ArcStyler (free edition available, http://www.ArcStyler.com) and already contains various MDA-cartridges. The community can be found here: http://www.MDA-at-work.com
And then we all jump out and yell "surprise! we got you this tiny ad!"
Building a Better World in your Backyard by Paul Wheaton and Shawn Klassen-Koop