Pentax does have rebates, but I guess it depends where you purchase from. Pentax in the U.S. had a some sort of rebate program that was not promoted here in Canada (I don't remember the details), but I saw a rebate during the autumn for the *ist DL and DL2 that was on the Pentax Canada website. I was so tempted to go for that two lens DL2 kit - a $100 rebate I think it was. Would have been nice to put towards additional accessories like a bag or UV filters.
Oh - Wildboar. To my best knowledge, Pentax Canada doesn't have a predictable interval on their rebates. I'm not sure about the U.S. Sorry.