For which system? Intel should have several 915/925 boards that take AGP. They would also use DDR2. AMD didn't move to DDR2 until AM2, but most of them should use PCIe. My guess would be to look to Asrock, they have a habit of making odd boards.
I was hoping to find an AMD mobo since I tend to lean AMD for all my builds. The general info you provided makes it look like that will be unlikely. However the info will help me on my quest to find my best options. I will do some homework on the ASRock motherboards to see what they have.