I've just added NTLM authentication support to BottomFeeder, but I can't take credit for it - that goes to our engineering team, Tamara Kogan in particular. In Bf, we use the NetResources package for HTTP support, and we had previously implemented full support for Basic and Digest authentication. I'm able to bypass that now, and just go to the base library support - which is great, since it's now code that I don't need to maintain.
It's not shipping yet - I have to migrate BottomFeeder to VW 7.4.1, which is not quite out yet - that's imminent. That means that the current dev version, base don 7.4, will not be promoted on 7.4. I should have a new release out shortly after 7.4.1 ships, as I'd like to get this new support out. Stay tuned.