Here's an interesting article I just found:
Taiwan makers: Blu-ray HD DVD stalemate may boost dual-format devices
Jimmy Hsu, Taipei; Adam Hwang, DigiTimes.com [Thursday 14 December 2006]
The stalemate in the Blu-ray Disc (BD) and HD DVD battle to become the mainstream blue-laser DVD standard may encourage makers to offer dual-format optical disc devices compatible with both formats, according to Taiwanese makers concerned.
While Walt Disney Studios and Twentieth Century Fox recently affirmed their support for BD, neither of the two next-generation blue-laser standards has gained the upper hand, the sources indicated. According to information on Amazon.com, there there are 203 HD DVD movies and 196 BD movies available for sale, the sources noted. In addition, consumers have seemed to be neutral about the two standards, the sources said.
Consequently, Samsung Electronics has planned to offer dual-format recorders that can record and play back BD and HD DVD movies, the sources pointed out. Hitachi-LG Data Storage (HLDS), a member of the Blu-ray Disc Association, is considering production of dual-format devices, the sources indicated, noting that a dual-format device would be more expensive than a single-format device.
http://www.digitimes.com/systems/a20061214PD201.html