Here's a project that I've been working on - finally nearing completion. It's an OSC-receiving USB to CV generator. It uses Teensy, but I think there might be some interest here too.
At this point, I would appreciate any and all feedback on the project. I'm also considering doing a small run of PCBs and kits in a week or so, if there's any interest.
Okay, and here's a modified version which uses Arduino.
This allows a Duemilanove to replace the Teensy 2.0. It won't fit on the PCB, but I bet people can find good ways to incorporate it. Works for me, test it out!