DNS fun: forward for one domain?

[Ken D'Ambrosio]

Caveat: I'm a pretty good sysadmin, but DNS is one of my blind spots.  
If I use incorrect terminology, please try to read for intent.
</whiney-assed attempt to explain this gaping hole in my knowledge>

Hi -- using BIND, I'm trying to forward DNS queries for one (internal) 
domain... well, internally.  But it's not one I'm hosting, so I can't be 
the master for it.  All other queries, I want handled normally.  I've 
Googled/played around with various options parameters, but can't seem to 
find the right magic sauce sequence.

Any pointers?

Thanks!

-Ken