I sold 100 shares of Apple for 173.253, and 70 of Bombardier for 7.93. With these mad moneys I bought 460 shares of Palm at 8.439, 315 of AMD at 6.2082, 80 of Intel at 23.54, and 145 of nVidia at 13.139, then to diversify a bit I picked up 80 of Bank of Nova Scotia at 48.97, and 60 of CIBC at 62.88.
Of course, if you add up all those numbers you probably won't get a zero sum, the remainder has evaporated in commissions. A small price to pay for the gains to be had. That said, if I start trading a bit more I'll probably open up an account at some online brokerage with really cheap fees, but with the volume I'm doing now it doesn't really bother me.