The Domino Theory is a nice scare tactic - if we allow (an argualbly reasonable) A, then B, C and D (all arguably unreasonable) are sure to follow. It however avoids looking at the actual issue, and goes straight to the lizard brain.
Another view of this lap-dog bill,
Op-Ed Columnist - Making Financial Reform Fool-Resistant - NYTimes.com
Of course, the current Prez isn't a constitution scoffer and power usurper like the previous one. But the danger is there.
Re. Lehmann, the financial sector is still working out and unwinding the various deals left over. To think that the government is able to step in and do so quicker, and with less market turmoil (read: large drops in prices as the stuff is sold, affecting the next bank and the next), is rather silly. Also, it is in those fat cat's interest to keep financials un-nationalized, so the teeth of this proposed "reform" are hard to see. The main benefit is that the people running these companies are mainly concerned with the size of their bonuses - it's the only way they can keep score on Wall St. - and any government intervention will make said bonuses vanish. Of course the thousands of people working for the financials, and not making the big bucks, will be out of work...