So you're too busy to find the information yourself, you want someone to go research it for you and write you a nice little "dd-wrt for dummies" guide?
In that case, I really don't think you want to try dd-wrt right now, it isn't officially released for this router yet and the version out there has some SERIOUS bugs. Whatever problems with the stock firmware make you want to switch, you will have at least that many problems with dd-wrt. I'm not bashing dd-wrt I'm just saying that right now it's not ready for general consumption on this router.
In fact right now, dd-wrt is capable of breaking the wireless on this router in a way that makes wireless non-functional even if you flash the stock firmware back on. Wouldn't that just shoot your productivity all to heck?
Seriously, give dd-wrt some time, it's not ready yet... I am as excited as anyone to use it but not until it is a little less buggy than it is right now for this router. There's a reason this router isn't listed in the dd-wrt router database yet. They don't want everyone using it on this router until it's ready, only the brave few guinea pigs that can be part of the testing process.