Two simple fixes and an enhancements:
Per http://maven.apache.org/pom.html#Licenses, the distribution text should be repo (not jar)
Per http://maven.apache.org/pom.html#Repository, JavaNet1Repository should have legacy layout. To me, string comparison seemed the only way as all other speciality about this resolver has been discarded before arriving here (mostly to appease Ivy) :)
Add java.net Maven2 repository definition for convenience. Newer jars (e.g., javamail, activation) are unlikely to be available in Maven Central going forward. This could likely happen for other javax.* jars as well. Since java.net M1 repo is already defined, adding java.net M2 would be nice for completeness. This doesn't need to be present in the the default list of resolvers though.
IMPORTANT This project has moved to https://github.com/sbt/sbt. This issue still exists to avoid dead links, but GitHub limitations prevent the original issue from being correctly preserved here. Please see sbt/sbt#139 for the full issue and to comment.