[Jack Shepard] “Is the AJA IO device compatible with Media 100 Producer? I assume it is but I thought I would get some opinions”
My “opinion” is no. The I/O does not use DV-based codecs over FireWire but converts incoming signals into an Uncompressed-over-FireWire signal which is not supported by Media 100 (or anything else except FCP). Avid does something similar with its Mojo and Adrenaline systems.
[Jack Shepard] “And would you have machine control (say with a beta sp deck)?”
As long as you can use a Keyspan USB to RS422 adapter on the system you can control a beta deck with Producer.
[Jack Shepard] “Also I may have an opportunity to purchase at low cost a used Kona card. If I installed that in a powermac would I be able to use it running Producer or would I still need a version of HDe?”
Producer does only use FireWire I/O. So if you want to use a Kona card you need the matching (SDe, HDe or HD suite) software, which is locked to the board. You can buy the license for your board from Media 100.