I have a 5 quart porcelain coated cast iron (think Le Creuset without the outrageous price) Dutch oven that I put into the dishwasher occasionally. Never hurt anything but it is kind of heavy, so it's difficult to slide the rack in and out.
BTW, if you're going to use Barkeeper's Friend and a scrub sponge, make sure you get the blue scrub sponges. The green ones will scratch.
Life is much more manageable when thought of as a scavenger hunt as opposed to a surprise party - Jimmy Buffett