I have no idea why www.maven.org is serving up old (February?) snapshot of the documentation
and the download TAR (Beta 8) . It’s very confusing if you go there first.

And if you’re looking for Beta 6, go right to freshmeat.
It’s the default download off their page.

Of course, their brand spanking new address is maven.apache.org.
That’s where I’m getting my Beta 10 today :)