bzr-buildpackage for debian?

[Jamie Wilkinson]

This one time, at band camp, Bob Tanner wrote:
>I see
>
>arch-buildpackage - tools for maintaining Debian packages using arch
>tla-buildpackage - Suite to help with Debian packages in Arch archives
>
>
>Is there a bzr-buildpackage hiding somewhere?

Not that I'm aware, but I was thinking today: does bzr support nested
working trees?  I mean, does it just work? (I suppose I should just try it
and find out :)