I have a Sony HS10 on order from Japan (not from the online store whose name shall not be mentioned on AVS...)
I will be using DVI-D from a Radeon 7500 AIW into the DVI input on the projector. By all accounts, hitting 1024x768 should be cake, getting 1366x768 may be a little more difficult.
The DVI cable will come from Fry's... as my cable run will not be longer than 6ft. It'll be 6ft if I mount the projector on a shelf on the wall, under 1ft (the cable will probably be 6ft long anyway) if I just toss it on top of my htpc.