mobile trading devices

Anyone who knows me will know that I'm addicted to trading, it's like crack. When I'm not sitting in front of my computer I have to be connected and so far my BlackBerry has served me well. I was given an iPad in December and have switched it on once - I should really use it because it has 10gb...

I was thinking of getting an i-mate jasjam and connecting to the latest hsdpa networks for broadband access and trade with comsec while i'm on the move.I would like to know... 1.Which network is best for coverage and reliability. 2.How secure would it be for this kind of activity.I'm not...