A couple of us kicked off a RepRap users' group for people in Michigan (http://groups.google.com/group/reprap-michigan
) just a few short weeks ago, and we're already pitching in to buy parts for 10 extruders as a group. A few of us can also be found on IRC at #mireprap on freenode. Our first real-life meeting is on the 25th of this month, near Brighton MI, during which we intend to bodge two nearly-complete machines into working condition.
If you're in Michigan, or anywhere near Detroit, Lansing, or Grand Rapids (the three major population centers in Michigan - and consequently the three areas most group members inhabit), please join the group and show up to a meeting!