Just a quick note to say that I have found out from an iPhone web application game developer that up until the iPhone 3G was released that for every 3 iPhones that visited their site 1 iPod Touch visited.
Clearly this figure is in no way accurate - and only an indication - but I can’t see any reason why statistically this should not be a good sample.
This shows that either the iPod Touch players are not using the internet, are not game players or that the iPod Touch is nowhere near competing with the iPhone for market share.
I am still curious to find out the figures from outside the US - especially in territories where the iPhone is not available.