We've looked at doing a host-it-yourself version a la github FI (http://fi.github.com/) or the google search appliance. Although the pricing that tier allows is quite cushy, (http://fi.github.com/pricing.html), the company they used to wrap up the installer is dauntingly priced for our bootstrapped budget (http://bitrock.com/). So that'll probably happen after we get the SaaS version off the ground.