Just started playing with it yesterday... put in my $50, and got the $25 dollars from CNBC and started playing with it...
not bad. got up to $100. May throw in 1k or so and open up a full fx account that has slightly lower spreads.
Since the fx market is the most liquid market... should be better for trend. With the leverage involved, a small move in a matter of a few mins can yield some good results.