If you only consider hosting, but gathering data and formating takes more than $20.

"over the last few years data.gov has cost $8.3 million; the cloud computing initiative has cost $1.4 million; and USASpending.gov has cost $13.3 million"

http://sunlightfoundation.com/blog/2011/03/23/transparency-t...

So yeah, a bit more than $20/mo, but relative to the budget as a whole....

So, a few hours in Iraq/Afghanistan, then...

when released, data.gov was the largest RDF triple store in the world #funfact

I don't think that's true.. when released I don't recall any rdf data being available on data.gov. the rdf initiative came way later, no? On release it was just a list of external data sources with links and metadata.