Yes, Virginia, there are people coding with Cocoa in Iowa. More than you would expect, actually...
The Des Moines, Iowa CocoaHeads group is a monthly meeting for developers of all skill levels to discuss Cocoa and Cocoa-related topics, including iPhone and iPod Touch development. There are no fees to attend and anyone who's interested in developing software for Mac OS X and iOS is welcome.
We meet on the second Thursday of each month (unless otherwise scheduled) at 2670 106th St. Suite 180 in Urbandale.