I was just drooling in anticipation for pickaxe 2 and looking through
the table of contents on the pragprog web site.  I know this is
probably asking too much considering its recent release, but rpa-base
wasn't too far behind ruby-gems in being released, and I believe it is
definitely a worthy contender in the ruby package management arena.  I
was disappointed to see that it wasn't included in the book, although
a whole chapter was devoted to ruby-gems.

Carl