If your literature doesn't specifically say that it will burn corn as well as pellets, don't try it. You'll likely just jam things up.

Harmon may offer a retrofit kit.

I am curious about this as well. 'm educating myself in preparation for buying an insert for next season ('06-07). It would be nice to have the option if I choose pellet.

I noted recently that the Quadrafire pellet models support corn up to 100% (though they recommend 50/50 mix of pellets and corn). Harman does not claim to support corn in anything other than their dedicated corn stove, but I have not yet inquired with a them for a firm answer. I

Word on the Hearth.com forum is that 50/50 and 60/40 mixes are working well. They burn hot, so definitely check with the stove manufacturer first. Expect a bit more cleaning as well.

The exhaust from burning corn is also rather corrosive, so you may have to replace your exhaust vent more often.

If you want want to be able to burn a mix of corn and wood pellets, make sure you purchase a stove that is approved to do so. Our St. Croix Prescott can burn up to a 50/50 mix but I've found the sweet spot is a 70 pellet/30 corn mix with Dry Creek brand pellets. Runs nice at this ratio and yes it does burn hotter. No problems with the auto ignite with this stove using the corn mix.