Agreed with the sentiment already expressed: we should buy bitcoin.com if possible. If the currency is to take off, the Average Joes and soccer moms need to start using it, and refusing to take a .com domain simple because of ideology is, at the most polite, not pragmatic.
This is also completely distinct from the argument of "your grandma couldn't use bitcoin anyway, it's too complicated; she'd need a vastly simplified interface". Indeed, that would be a more than legitimate - and likely quite productive - use of the bitcoin.com domain.