In recent days, MIT and Norfolk Southern have issued 100 year bonds (with very reasonable spreads over 30 year US Treasury Bonds). There appears to be a rush to take advantage of this once in a lifetime opportunity to not just borrow but also to lock in extraordinarily low rates.
http://www.bloomberg.com/news/print/2011-05-18/norfolk-southern-follows-mit-with-400-million-offering-of-100-year-bonds.html