A few options are planned to be included:
After the PAL grabber has been finished, an NTSC scheme will be made available so that other people can build the card too. However, if you show your interest, Rob might think of making a series of NTSC grabbers too. It all depends on your interest. The more orders, the lower the price, and the higher the chance that ready-made NTSC grabbers will become available. Best chance is that Dark Castle is going to sell them.