has anyone switched from a blackberry to an iphone? i have a 3g ipod that is dying on me and i want one that plays video. my blackberry is two years old and is worse for wear. but, i am pretty dependent on email at my job and i'm worried that without push mail it will be a waste of money. as for background, first, i'm a noob. second, we use the google email client. so my email address is "@work.com" instead of "@gmail.com" but it all is routed through google. my email downloads to outlook and my blackberry. it is currently setup as "imap." does anyone have any experience with this? does it download your email every time you check it or every 15 minutes? if you're a business person, can it replace a blackberry? thanks for the help.