You can't copy and paste without a third party app.
You cannot multi-task, at least not on current iPhones from out of the box. For example, if I wanna listen to music, while composing an email then half way through, open the web browser, check the BBC headlines, then quickly switch to my Blackberry Messenger send a message to a contact, then open up a game of poker, switch back to my music to change song, then swtich back to poker to realise the game has just folded me poker Kings 'cause I didn't respond in time, then switch back to blackberry messenger, reply to my conversation then go back to my original email and finish it as I left off completely in tact, the check Facebook whilst all that other stuff is running in the background, I can.
Multi-tasking is advantage of having a smartphone. Apple have only just announced an OS upgrade that will allow it.
In fact, it's all listed here: http://blog.glcomputing.com.au/2010/02/why...iphone-for.html