I do a lot of reading on mobile devices, including an iPhone screen. Having more real estate to view content on, while keeping all of the current iPhone OS and AppStore (and hopefully Cydia) advantages makes it a unique device for the class it is in. I really would enjoy reading longer articles or items on a larger screen. It will be interesting to see the kinds of apps that start getting written with the larger screen specifically in mind.
Lot of criticism out there today post-launch from people who never intended to buy it with the leaked details. My biggest complaint is that they pandered to the low end of the market by offering a version without 3G capability. In my opinion, every one of these should have had the 3G modem onboard, ready for the owner to insert a data-plan SIM card (or not). North America (and many other places) are fertile for a mass-market computing provider to offer a 3G-ready net device other than their smartphones. Sprint or someone had a 3G netbook with lame features, but it was the exception rather than the rule. Apple insisted on including onboard ethernet ports and usb jacks on the iMac (among other examples over their history, going back to the mouse on the original Mac), and that kind of base-model leadership would have been awesome for this suite of devices, but not doing so also lets them keep the entry-level pricepoint ~$100 lower.
Since the 3G SIM card is optional, wonder if that means the device is carrier-unlocked, unlike the iPhones?
I have been pondering doing an iPhone OS thread on here with summaries of neat tricks and apps, including (obviously) stuff for jailbroken phones. Not sure how much interest there would be, but I see a lot of porn people carrying iPhones in the photos posted.