Interactive Brokers - Thanks for your clarification, coinmaker... I appreciate it!
I am in the U.S. too. Looks like IB is winning so far. Penntrade would not be too bad for direct trading if it did not have those limitations that Malyshek have pointed out.
You're right about calling a broker you are interested in, and finding out what's current and what's outdated. The Casey Research report, whose link I posted in my previous post, seems to be somewhat outdated. I think the report is a couple of years old, and some information about certain American brokers may not be current, but it is a good info overall.