On the Customise Markets frame, it would be very useful to be able to colour-code your markets.
So when I add the Barclays Premier League Winner 2009/10 market I can choose for it to have a green backdrop, but when I add the Barclays Premier League Relegation 2009/10 market I might put it in red.
People mentally categorize their bets using many schemes: Ante / Upcoming / In Play, Researching / Dabbling / Ploughing in big time,
and so on.
A simple choice of a few colours could make things easier.