A DVD-Recorder has been in the market for some time now. It uses the DVD-RW, and not DVD+RW. Can't tell you which is better but it the point is that HP didn't release the first DVD-Recorder.

More info on the pioneer drive can be found here: http://www.pioneerelectronics.com/Pioneer/CDA/Indu strial/IndustrialProductDetails/0,1444,796,00.html .