Megan McArdle, closing an excellent post on the repeal of Glass-Steagall:
Most importantly, commercial banks are not the main problems. If Glass-Steagall's repeal had meaningfully contributed to this crisis, we should see the failures concentrated among megabanks where speculation put deposits at risk. Instead we see the exact opposite: the failures are among either commercial banks with no significant investment arm (Washington Mutual, Countrywide), or standalone investment banks. It is the diversified financial institutions that are riding to the rescue.