Uber MME Muxer (UMM) is a program for Windows that (hopefully) makes it easy for moviemakers to batch process Q3MME's output to create .avi files.
Installation and set-up details are covered extensively (including additional download links and other explanations) in the README.

After a 17 months hiatus...
- Some code changes were finally made (bug fixes, new features): changelog
- The project is now hosted on GitHub
- There's a much more readable README

Links: Get the binaries! - Screenshot: Settings - Screenshot: Progress