Just a quick cross post to mention that Hbase trunk has now been migrated to a Maven build system.
You can find some getting started info on the wiki here: http://wiki.apache.org/hadoop/Hbase/MavenPrimer Over time, some more tweaks and directory changes may be flushed out. If you have any questions or troubles, feel free to post, and I'll try to help out. cheers, Paul Smith