In their infinite wisdom, the Maven guys have decided to make a new Maven plugin to create uberjars that's totally separate from the jar plugin and the assembly plugin called the "shade" plugin. In addition to making it easy to create jars-with-dependencies, it has a mechanism for doing automated class file rewriting, to dynamically modify the names of packages in place.

Cool, huh? But it doesn't always work, (reflection can break it) and it currently only exists in alpha. With that said, it may be a good way for us to protect people from our very large dependency set (including Ant, Jetty, and BouncyCastle).