I, too, am on a PC (with Hearthfire and Dawnguard), and yes, 'Hearthfire' as a freebie for PS3 users would be a grand gesture as would any discount on Dawnguard. I cannot understand why anyone would be against this gesture - it doesn't hurt them at all. Hell, we all know that after some time has passed, the prices for DLC will be discounted for everyone, anyway.
But every other company manages to make DLC's for games on PS3 which work fine and aren't delayed by "technical issues" It's Bethesda's fault for not learning the internal workings od the PS3's memory system. If somebody drove a car without learning how to use it first and then crashed, is it the car manufacturers fault, or the drivers fault?
I've had it with this, please learn what you are talking about before you complain. All those games aren't Skyrim, all those games don't need to save every little change you made to it during your playthrough, thus all those games aren't extremely memory demanding. Bethesda are the only developers that use this to provide us with the ultimate feeling of freedom when roaming their worlds, and cutting in that and removing that feature so it works on PS3 would be possible, however, that would take away the what they aim to create and thus it would take away the identidy of the game so I completely understand why they take more time to change other aspects to the beating hearth of the game can be remained intact.
You should be thankfull they even try to fix this even though it takes a lot of time and effort, not every developer is willing to do such things, there are lots of example of poor ports to other platforms where there was nothing done to improve the poor conditions.