Yet another not quite as thorough but still worth a gander 3.0 tutorial over on Mobile Orchard today, Copy & Paste With UIPasteboard:
There are two system pasteboards: a General system-wide pasteboard that’s used for copy-paste operations and a Find pasteboard that holds the last search string.
Additionally, applications can create their own pasteboards that can be used by other apps. For example, a point-of-sales app and a credit card terminal app could use a shared pasteboard to pass payment details back and forth…
Fairly straightforward stuff, especially if you’ve delved into NSPasteboard on the desktop … but since we actually never had any particular reason to do so all that deeply, it was still a worthwhile read!

Im only asking this because my friend got an ipod touch and now he has an application for it that lats you use it as a phone(call/texting). and im pretty sure you can put music on your iphone. So, now whats the difference for buying one of them and not the other? can name applications they have and service they get.
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