Plain, old, generated HTML works perfectly. Plus it is very easy to host.
If this is something you guys can implement, I would suggest looking at it.
Your hosting will be MUCH simpler, cheaper, more profitable (even though you say you are running a non-profit), general footprint will be smaller, and pages will load quicker.
That's just my $0.02.
I love what I see here, but I can't bring myself to going back to a db-powered blog from Octopress.
The day you guys implement something similar, you will have 1 more user though!
Either way....awesome execution and congrats on everything you guys have done. Love it so far.