They Rule, has interactive maps that show how companies are connected through their board members.  Go to: Load map, ‘then eye of the rich’ for a nice overview of corporate ties.  Another good one is ‘!7 most powerful!’ which is self-described as:

These are the seven most connected people in the Fortune 100.  Together the 6 men and 1 woman are on the boards of 26 companies!

When you’re done with that, OpenSecrets.org – (“Your guide to the money in U.S. elections”) shows who gave and who got contributions.  So far the largest contributor to Pres. Bush is Merrill Lynch at $364,000, although other financial institutions are close behind.  Merrill has contributed $652,760 to this election cycle, 87% to Republicans

For the 2002 elections, over $964 million was raised for House and Senate races.  I guess that’s one way to keep the economy going.