Yes - not sure if the program has changed since I dropped DC in '03, but at that time it was a 190 pt fee per 2000 pts. converted. (I think...it's possible that my math is slightly off. )

There were no fees at the time for hotel conversions. Not sure if there are today. You also had the option to pay cash in leiu of the fee - so you could get Cash + 2 DC = 1 FF.

In the grand scheme of things, the fee isn't a big deal - the power of Diner's is liberating orphaned miles, so an extra few hundred points to get a dormant account up to award level is minor. Still...I found the fee a tad bit annoying. Other cards that make far less money off of both the merchants and cardholders can afford to give out one Starpoint or one FF mile per dollar with no garbage fees. Why can't Diner's?