Well - I am testing with the cable that came with the Shimian - and also with this cable:
Which says dual link on the cable so I think I am okay cable wise. The cable from ta_planet does not say dual link on it but it has all the pins of a dual-link cable on the connectors.
Well mine has not worked yet - but when I have it connected to the computer on the 8800GTS or GTX550Ti, I get a solid blue light and the backlight comes on. Windows 7 recognizes it as a monitor and says it has extended my desktop to it. I can move windows off the screen onto it, but can't see them on the monitor. The light will flash blue when I either set the resolution for the Shimian to some weird setting or when I plug it into my 6800GS card (which I do not think is compatible - may not be dual-link).