Don't pursue this ^ unless you want to see a Republican take the White House in '08.
Bloomberg, although an attractive candidate to many, would mostly capture votes from disgruntled Democrats who can't bring themselves to vote for Hillary. A Bloomberg candidacy would lead mainly to a split of the Democratic Parties' voting base, with far fewer Republican voters moving over to his side. Unless, perhaps, the Presidential campaign devolves into a full fledged "Who's the better friend of Jesus" situation. That < could lead to a big number of dissatisfied Republicans who find Bloomberg's economic platform to be of more importance than Huckabee's piety -- and more palatable than taking a chance on a candidate as old as McCain.