Pay taxes and other government debts here: http://www2.egovlink.com/press-release-bitcoin.cfm

You can already buy food at a couple places in Vegas where I live.

Kind of a ridiculous comment. I would buy groceries for someone and deliver them if they gave me 1 Bitcoin. I would also hand them my homegrown vegetables for a Bitcoin.

sure, you (and comparatively a minor number of others) would.

But as a society, bitcoins is still not an accepted form of exchange in general.