single server: distbb or parallel pbulk?

[John Marino <netbsd%marino.st@localhost>]

I intend to set up a build environment to regularly build pkgsrc on 
DragonFly x86-64 (trunk) to provide reports to bulk build mail list.

It's still not clear to me which facility is better on a single machine, 
distbb or pbulk.

As far as I can tell, distbb has no documentation whatever outside of 
whatever the package itself installs.

The pbulk situation is not much better, but at least there's a doc:
http://www.netbsd.org/docs/pkgsrc/bulk.html

It's pretty lacking though and doesn't cover a lot of essential 
information, especially involving multiple slaves.  Joerg gave me a link 
to recent scripts he uses but I haven't had a chance to review them yet.

In any case, up-to-date clear concise and accurate instructions on both 
tools seem to be missing.

Or have I simply not found them?  Can somebody provide a technical 
recommendation on which tool we should use for this, and which 
instructions should be followed?

Thanks,
John