For example, this is the Indiana form to do it online: http://www.in.gov/ai/appfiles/sos-registration/landing.html . Cost? For profit organizations: $85.00
Granted, this wont set you up with bylaws, formal/complete articles of incorporation/organization, etc. But if you are small, those don't matter, you can do them later, and if you arent small/simple structure you wouldn't use mycorporation anyways.
According to most Attorneys I know who deal with investment/securities stuff, unless you are in a handful of states, the idea that you need delaware org is sort of a leftover thing from the past. As usual, though, you should check with an attorney or accountant who knows your state.