Interesting, I have researched this like 1.5 hours ago

Prior iOS5 I allways used a library called FontManager.. and it allways worked fine for custom fonts, and have been approved in the appstore etc too.
Now, this library doesn't work anymore, since I gave ARC a go..
So I have been researching, I found one, (which is new, so topics about being really old is a lame excuse imho, cuz i found alot).
There is an entry in your plist called "Add fonts, blala".
So then you can add your TTF's to your project, and just set the UIFont of a label, to a custom font, and it should work just fine.