This happens automatically with the free version of Unity, and also the basic version of Unity iPhone.
With Unity Pro, or iPhone Advanced, these watermarks do not appear, and there is no obligation to show the Unity name or logo.
(It is mentioned on the license comparison page)
answered Apr 16 '10 at 04:15 PM
yeah, you have to buy it to make it go away, only seems fair.
answered Apr 16 '10 at 05:04 PM
i was curious...
answered Apr 17 '10 at 10:09 AM