1066 is actually a FSB of 133, and 800 is actually a FSB of 100. Both of which are DDR, meaning its esentially twice as fast (266 and 200, respectively). Now I don't totally understand this part, but there are 4 busses or something running at those speeds, giving you your 1066 or 800 FSB.
I have yet to see a board that cant support 133 FSB (that isn't 5 years old), and if it can support 133, it can support 100.
As for your question. I would bet my paycheck that the boards you are looking at support the FSB you have. I don't know if they will support your specific CPU, as some boards have restrictions based on the CPU core.