I had trouble building from source (never did figure out the problem) and was delighted to find a precompiled binary. Installed/worked fine on Snow Leopard.

If you haven't used ncftp, you're in for something of a treat. Handles autocompletion, recursion, etc with virtually no effort on the user's part. I use it a lot for local (lan) transfers where user-to-user ftp is okay, but it's perhaps even more useful when doing anonymous ftp to a download site.