This is off the street with no substantive documentation. Word is that Hewitt is being shopped by the investment bankers. I'm not sure who can put up the cash, but possibly IBM or HP? If it does happen though, you heard it here first.
Another rumor is that IBM has been in talks with Mercer. While I have no idea why Marsh Mac would want to spin off this business unit, it makes sense for IBM to bring in some HR expertise.
This next one does have some documentation. My guess is that a Bank of America and Fidelity merger is entirely speculation though.
I'll be putting out real content again soon (once I think of something interesting to talk about).