The services sector continued its expansion in September-- but at a considerably slower pace than anticipated.   Today's Stocks & Topics: The Downside of Free Trading Fees, Mortgage Re-Defaults, IBOC - International Bancshares Corp., What to Look Before Buying a Stock, SONO - Sonos Inc., XLE - Energy Select Sector SPDR ETF.   Plus: Key Benchmark Numbers and Market Comments for: Gold, Oil, Gasoline, Treasury Yields; TRIVIA QUESTION: "Can you name the LAST auto manufacturing company to be publicly listed in a U.S. stock market? And before that event, which was the NEXT MOST recently listed car company-- and in which year did it go public?