If you have a use for a DVD burner, then now's a fine time to buy one. I prefer DVD+R. From the few reports I've seen, that dual-standard Sony is not all it's cracked up to be.
If you don't have a use for it, then you might as well wait. Wait for what, I don't know. Lower prices, I guess. The "format war" is not going to be over anytime soon. I guarantee that any DVD burner you buy now will be worn out before one standard "wins". Ever hear of Sony Beta video? Well, they just quit making them THIS YEAR! And if you have been awake lately, you may have noticed that Blockbuster, et al, have begun to get rid of video TAPES in general.