Their business model offers low overhead with "at-home" repair techs servicing geographically areas and can undercut local competitors and offer jobs to college kids and young workers who get paid fairly.

Our company buys back the broken LCD screens from repair shops ( http://www.harvestcellular.net ) around the USA and hear about them all the time when we talk with our vendors who are their local competition.

I couldnt get the link to work. But I found this website that had all the 3.1.3 firmware for 2g, 3g and 3gs and instructions on how to downgrade here.

Your link wasnt working for me, but I found the 3.1.3 for 2G, 3G and 3GS at this website
http://dustinjones.me/2010/07/02/download-3-1-3-f...