The financial crisis has driven investors into the bond market and away from the stock market.
The equity-bond divergence is currently at its widest this century. Bernanke, at this time, is maintaining a relatively slow money growth policy, which may lead to a further collapse of the stock market and economy. This may initially lead even more money into the bond market. However, if there is another collapse of the stock market and economy, Bernanke is likely to respond with very aggressive money printing, at which point bonds could collapse and the stock market could soar.
It is much too late to be a bond buyer. If Bernanke starts printing aggressively any time soon, price inflation will push long-term interest rates higher. Stay away from the bond market, it is a trap.