I just tried a test of HD content on a Sony P234B from:
http://www.microsoft.com/windows/windowsmedia/content_provider/film/ContentShowcase.aspx
Seemed to work just fine
I don't see how this monitor differs from the Apple - same resolution and thus should be HDTV ready. I must say I bought under that assumption.
I have just acquired 2 of these and I am delighted with them - only one with DVI at the moment until the new rig arrives.
After following this thread for a good while, I am bit surprised that no one has picked up on this - so I thought I had best register!
Matrox has released a new Parhelia dual-link 256MB card for $699 - I include a link below...