My own results with the Dell SR2320L from a quick test with my (PAL) A600:
NTSC works, a few pixels lost at maximum overscan
PAL works, a few pixels lost at maximum overscan
Multiscan works perfectly
DblNTSC works, but the top of the screen spills over onto the bottom of the screen at maximum overscan
DblPAL works perfectly
Euro72 works perfectly
HighGFX works perfectly
Euro36 does not work
Super72 does not work
HD720 does not work
There's a bit of vertical banding, and interlace modes seem to lose some minor horizontal detail, but given what others have said, it sounds like much of this can be fixed by adjusting the monitor settings (which I haven't even attempted yet). All in all, very glad to have this monitor available. And kudos to stevee617 for discovering it!