Yeah.  The issue is our custom shims may go away with sbt-server and sbt 1.0.   So the delegating task may be a better option, paired with Mark's not-yet-design-described 'project nature' feature.  In any case, we can revisit after the holidays if the situation changes.  We need it like this for the 1.1.0 release, but hopefully can remove the Shim portion for the 1.2.0 release.