What brokerage accounts are people using? I've been thinking of doing some more active trading than my 401K and IRA, which I haven't touched.

I keep missing out since I haven't opened an account yet and I'm holding cash. The prices are still pretty high for many stocks, but there were some really good buying opportunities in the last week and it's possible things will be volatile for a while. Oil was at its lowest point in several years but made some gains yesterday. OPEC meets Thursday and Friday so there may be more gains.