Seconded on the UBNT gear. I've used PowerStation integrated antennas at 5.5km, and PowerBridges at 6km. The 5.5km link is even partially occluded by trees and still gave me good throughput. I've used the nanobrides in shorter links with good success as well. All this gear is very cheap and reliable.

Terribly sorry, I wrote BDC by reflex. You are of course correct: I am using the Samba3 server for serving files only.

Samba4 is quick becoming a drop-in replacement for AD, complete with vampire scripts to mimic your existing servers. It may be alpha, but it's so good that there are reports of people using it in full production. Combined with a Samba3 BDC for file serving, it's been running my (admittedly small) domain for more than 2 years.

Thanks for nitpicking my nitpick. Your definition of terms is more highly evolved than my own, and I'm glad you took the time to try and increase the calibre of discussion here.

Small nitpick: Atheists aren't those who are looking for an abolition of religion (they couldn't care less, provided it doesn't interfere with them). Anti-theists on the other hand, are.

I also got a better deal ($179 CDN brand new!) on a eee 701 with windows preinstalled. Cheaper than with linux for whatever reason. Wiped and reinstalled with eeebuntu on first boot.