I don't know how many posters read Roy Weitz' FundAlarm "Highlights & Commentary" monthly article, but this month he compares the commissions charged by various brokerages to buy & sell no-load mutual funds.
It's been a long time since I've seen one of these. This is one of the better comparisons, provided by a guy who accepts no advertising and is pretty much the scourge of the industry.
Excerpted from http://22.214.171.124/hilights.htm
"Based on this table, Firstrade seems like a screaming deal, Siebert, Fidelity, and E*Trade are strong, and Schwab's commission rates don't seem quite as exorbitant, given Schwab's extensive NTF program... What these tables don't capture, at any broker, are intangibles such as service and continuity, account features such as bill paying and cash management, client-friendly account statements, and Web site tools such as portfolio analyzers..."