Yeah you can't use Xgrid for Photoshop or iMovie. People are thinking in terms of low latency requirement high processing, however grids and clusters are designed for low bandwidth per minute computations. They are used for insane math and rendering because you can send (in the case of SETI) about 240K of data to a node, have it crunch for a whopping 10 hours and have it come back. iMovie or FCP would need the network to carry gigabytes per second to say only 5 computers, then receive these files back and expect it all to work well? Not likely. VTech could pull it off with their 20GBps Full Duplex Fiber, but the best home networks are usually 100 Mbps Duplex switched networks, which isn't going to cut it for photoshop (which to be broken up, sent out in 4 or 9 blocks, processed and returned would be way too much overhead for anything but a G5, which already runs Photoshop fast enough). Xgrid isn't a consumer app, it's for massive jobs which take many hours to complete (instead of days on one machine).