o compiler implementations
  o jsr199
  o jikes
  o pizza
  o jruby (maybe?)
  o jpython (maybe?)
  o c# (maybe?)
o documentation
o dependency analysis for proper re-try after errors
o removing of anonymous classes if parent class is being removed
o ability to add (contents of) jars to the store ...and be able to remove them again
o maven plugin to compile with any of the compilers -> codehaus.org/mojo
o compiler discovery via META-INF
o finish common configuration for some compilers
o build javac classpath from provided classloader