Reuters: Merrill Lynch in talks to sell itself to Bank of America for at least $38.25 billion

That's about a 50% premium to Friday's closing price. The short covering rally in Merrill will be rather dramatic.

why would BAC take on such deal at this joint?

Bank of America to buy Merrill Lynch for $29/share: CNBC, citing WSJ

Bank of America Reaches Deal for Merrill

It sounds as though they have created an institution which is 'too big to fail'.
Perhaps this is of a size whereby if it gets into trouble an attempt by the US government to guarantee it would bankrupt them?
How would a bail-out if it became necessary compare in size to the F & F bail-out?
EDIT:
Why the heck is BOA paying over the odds for Merril Lynch?
Something smells very, very fishy to me, and my guess would be that taxpayers money and/or guarantees are being funnelled surruptitiously:

Without this buyout announcement Merrill Lynch (MER) would have gotten absolutely crushed Monday. That is absolutely certain. The closing price of Merrill Lynch was $17.05 on Friday. Mother Merrill's market cap was roughly $26 billion.

Thus... Bank of America (BAC) agreed to pay $44 billion for a company that would have been worth $18 billion on Monday's open, assuming a $5 markdown on Monday to $12. Why?

No one had any cash to buy Merrill other than BAC - so what's the rush?

http://seekingalpha.com/article/95414-bank-of-america-merrill-shotgun-ma...