Library of Congress' hidden Twitter computer room: WalletPop takes a peek

The Library of Congress recently made headlines by announcing an unusual acquisition: every public tweet ever sent on Twitter. Cleverly, it made the announcement by Twitter -- and the interest brought the library's servers to a standstill. For all that, the IT guys in charge of keeping every tweet for

posterity don't tweet at all.

Why would the Library be interested in obtaining something like that? And where are they going to put those tweets? I was given an exclusive invitation to come to Washington, DC, to find out.