Thanks for the answers. I've noticed there are quite a lot of movies in HD-DVD format going for much cheaper than the same movie in Blu-ray, so was hoping to build up my High Definition movie collection on the cheap! Good to know that I can't do that with the 1800BD.
A DVD player that can handle DVD, HD-DVD, and Blu-ray would be verfy useful. Does anyone know if any players out there can?