Also, YouTube was announced since then. I wouldn't be surprised to see Adobe or
Amazon's eBooks added in the next 12 months, either.
I think there is a big gap between what customers think they want and what they'll actually buy. When Apple finally caved in to all those people begging for games on iPod, and licensed a number of games, the total number of downloads was pathetically low, in spite of a price-point around a quarter of that for the same game on other platforms. People begged for it, and then when it was released, decided they didn't really care anyway.
Apple are going to focus their software development efforts where they're going to add the most value to the product. iPhone ships with the software it
needed in order to be viable, and nothing more. iPod touch is the same; they've got it out the door with the features it needs to be a sales success, and anything else can wait until later.
So where do I think they're going next? iPhone will get iChat before it gets MMS messaging; its simply more beneficial to Apple to do iChat first. MMS messaging will come pretty quickly though, as the carriers will be insisting on it (more ways to use the phone equals more usage of the phone equals more money for the carriers). iPod touch will eventually get some of the apps that are already finished for iPhone. Mail.app for iPod touch will be an optional install that will come with a big disclaimer that it is not a supported application. eBooks will be available for purchase through iTunes - the structure is already there; I have a few PDF-casts already, all the touch needs is a custom-made PDF browser.