I don't think it's a fair comparison, but 1.5 million is still really good. I'd really like to find out the numbers for individual games, though. Tekken, Grand Turismo HD, Calling all Cars, flOw, MK 2 Online, Blast Factor, and others would be very interesting to see.
I've downloaded all the free content just because it's there, so what I'm really interesting in the payed-for numbers. Any chance we'll ever see that?
More importantly, how do I create a EU and/or Japanese account name?