I started another, hopefully more promising attempt, that goes a different way in terms of structuring work and using the java platform.
Playground for some Scala code. Goal is the implementation of a fully working stock exchange that supports auctions, continuous trading, price feeds, order life cycle etc. For more detailed docs see $ROOT/docs directory. This project is at a very early stage and lot of exciting stuff is yet to come.
If you like to contribute drop me a line :-)
To create the project files for your IDE (eg Intellij):
sbt gen-idea
Or to simply run all the tests:
sbt test