Yeah, mplayer will do that too, but there are so many different things that play video (flash players, quicktime, etc.) that I don't want to rely on the player doing lag compensation if I can help it.

As for the delay being on the headphone side, who would buy these things if there was really that much lag by design? There's not nearly that much lag with my bluetooth keyboard, that's for sure. Yeah, stereo audio is going to be higher bandwidth than my typing speed, but if the latency is that bad, it seems like something a lot more people would have mentioned in the Amazon reviews and so forth.