I just purchased and donated one of these special dual-link adapters to the 30" display for Omni, Optik et al to use. The 30" display now resolves natively. It was $107 new.
$99:http://store.apple.com/us/product/MB571Z/A/mini-displayport-to-dual-link-dvi-adapterPlugging directly into a 'normal' DVI adapter ie single-link DVI will not support the display's native resolution of 2560x1600. Single-link adapters will instead deliver a maximum of half the supported resolution, 1280x800. Single-link adapters include the typical Apple-style DVI>MiniDP adapter dongle most are used to using.. See:So if anyone feels like giving the video group a christmas present of this pricey adapter cable, that'd be really great! It would be kept with the monitor.Best,David