The iPod, iPhone, iPad names are iconic at this point, but they'll never be intuitive as far as spelling and typing are concerned. It's just uncommon to have to type an uppercase letter after the beginning of a word. Sometimes a proper name, like DeIntinis, will have that combination, but many will elide the vowels in pronunciation and then use an apostrophe in spelling it, like d'Antoine.
I care how I spell the Apple product names but I mess them up once in awhile and sometimes don't go back to correct them.
Apple won't care if you email your cousin that you love your iphone, trust me. They will just dream of laughing all the way to the bank when your dear cousin writes back "I know, I can hardly wait for Iphone 5 to come out!!!!!"
On the other hand, woe betide you if Apple finds out you are trying to make a buck off using those names for your own purposes, and probably then it will not matter which way you spell them, Apple may spell out its concerns to you in some court papers.