Let the hive mind of Engadget get that for you.
"I am looking for a device that will stream sound from one source to several recipients. For example, I want to stream sound from my TV or stereo to my phone or MP3 player that has radio and Bluetooth capabilities. I have looked into radio transmitters and they seem like a decent choice, but I can't find one that uses external power (USB or from the plug) and I would want one with a transmit range of around 50 meters. Thanks!"
Paramount's HD-DVD only deal is reportedly for 18 months. I also think there's little chance now of Universal going Blu Ray or neutral. And I don't think Sony Pictures will go neutral any time soon either, not to mention all those PS3s out there.
So if both formats will still be around 18 months from now, then dual format players will be the winner. I'd buy one now if they weren't so expensive, but I'm sure they'll come down in price now manufacturers can have the confidence to invest in making them in quantity.
I reckon I might have to wait a year for an affordable dual format player, so I plan on buying a really cheap player of either format just for that year, feeling pretty certain the DVDs I buy will work on the replacement.
Right now, it looks like that cheap player will be an HD-DVD one.