switching from sprint droid to iphone 4 an APP FOR lol

i was wondering how easiest way i can transfer contacts from droid to iphone.. i had a droid thru sprint and upgraded to iphone4.. droid is not activated, iphone is.. which would be better: sync info on droid (its not activated, can i connect to wifi tho, instead of mobile network and sync to google? ) then open google somehow (how??) on iphone 4 and sync?? or connect droid to usb and laptop and somehow transfer to iphone4 as a different folder or drive? i don't use outlook or anything, can i just use windows explorer and drag and drop or something? or is there maybe a specific app that takes care of this?? even how to transfer all info from droid onto SD card and transfer THAT to iphone??? trying to figure out easiest way to transfer my boyfriend's stuff.also, what best ringtone app for iphone..thanks!! (former ipod user turned droid user turned back to iphone user lol)

-kristin