We currently host our own maven repository for jars:

http://rhbd.s3.amazonaws.com/maven/indexV2.html

This is maintained manually using s3, jquery, html, ...  Its a nice little app, 
but in time we can officially publish direct to maven central using this guide, 
and hosting on sonatype (or else maybe red hat one day can be an official maven 
repo):

https://docs.sonatype.org/display/Repository/Sonatype+OSS+Maven+Repository+Usage+Guide#SonatypeOSSMavenRepositoryUsageGuide-2.Signup

Either way : Lets start publishing to maven central : its the standard way that 
jars are shared for apache related projects.  Examples:

- http://mvnrepository.com/artifact/org.apache.pig/pig/0.10.0
- http://mvnrepository.com/artifact/org.apache.hadoop/hadoop-core
- http://mvnrepository.com/artifact/com.datasalt.pangool/pangool-core/0.40