Before you guys release the next version of ejb3 can you try to get it working so that mysql can run all the services. Replacement of hsqldb-service.xml throws all sorts of sql exceptions when.
The problem turns out to be a change introduced in JBoss 4.0.1 that 'hard codes' the Timer table column names in the EJB Timer GerneralPurposeDatabasePersistencePlugin.
cheers,
Binario