I have two microATX motherboards, AM2 (with 64x2 4200 and 64x2 4400 CPUs) and I don't think that you will find or need one with 2 IDE connectors.
Mine put both the optical drive and the PATA/IDE hard drive on the same cable, functions without problems. That's how they still are set up to this day. My boards are Asus M2A-VM and ECS 7050M-M.
If you just want additional IDE connections, just do like I do and put a controller card in one of your PCI slots.
I understand that the 2 devices on one cable thing has been operative for some time now.
When I installed XP, I just used the Cable Select settings, putting the hard drive at the end connector. As long as your BIOS boot options reflect a boot from the optical drive, the install will go smoothly.