Moving from Tech to Trading?

DJ Paradox asks: "I've been working in IT for around 11 years now and more recently in IT Security within the Finance/Investment Bank arena. I'm looking into the prospects of a change to an entirely different field, working on the trading floor. I've read a few books on trading but most of them seem to be geared toward the Do-It-Yourself-Day-Trader instead of a professional career. I don't have a finance degree but have a permanent position with a good sized global bank and a manager who is willing to help. So I ask Slashdot if anyone has recommendations for courses, books, websites that I should cover to get a head start in this transition. Have any of you made a similar jump? Should I try to move towards a more trader-aligned tech group first and build relationships? Should I try to go for Equities or Futures & Options trading? What markets would be the best to start/learn with?"