i use my phone a lot... i have an iphone 3g which i jailbroke and unlocked... so i'll be able to get a pay as you go sim plan wherever i go in the world.. i tether w/ it... make calls... check emails.. i've had to ebay w/ it a few times... this thing is a lifesaver.
i realize i've become really dependant on my phone to check time/ location.. i use it for gps/ music... i can go without it, but it's become like a friend.. it feels so comforting to have it.