Update 18 December 2007:
I’ve discovered a better way to force Finder to browse the contents of a network drive. You can read more here.
I wrote recently about the problems that I was having connecting to a network drive from my MacBook.
I still haven’t solved the problem, but I have come across something else: If I share a drive on my Windows XP computer, the computer will be displayed in the Finder Window, along with my network drive. I can browse the Windows machine, but for some reason, I still can’t browse the network drive.