[Bug-wget] mirroring one sourceforge package?

[Karl Berry]

The bug (?) -- running
  wget -m -np -nv \
  http://sourceforge.net/projects/biblatex-biber/files/biblatex-biber/current/
ends up downloading many things above that directory, despite the -np.
Doesn't that seem wrong?
This is with wget 1.12 compiled from the original source.

The request: does anyone know a way to mirror one package (ideally a
subdirectory thereof) from sourceforge?  Specifically, I want
http://sourceforge.net/projects/biblatex-biber/files/biblatex-biber/current/
(I don't actually care about using wget, could be anything. :)

I did a bunch of searching to no avail.  My friends at CTAN have tried
from time to time over the years but never found any really reliable
method -- always ends up coming down to scraping the HTML :(.

One possible answer, "Joining the sourceforge mirror network"
(http://sourceforge.net/apps/trac/sourceforge/wiki/Instructions for
joining the SourceForge.net mirror network) is not what I want to do.  I
just want one package, not to help sf.

I suspect there is no good way, given sf's policies and setup, but
thought I would ask here.

Thanks,
Karl