I send a lot of texts each month, let me go into detail...A LOT of texts. I was wondering if any text heavy people have been using iPhone and how easy it is to manage texts and respond while doing other things such as watching a movie or listening to the iPod. Also, does there seem to be any delays in texts? I know sometimes with my Sprint phone I won't receive someone's response until I send another text - some kind of system backup I suppose. Basically, what's the user experience for text hungry users? P.S. - I know unlimited texting is an extra $20 a month (ridiculous compared to Sprint's $5).