Apple has slowing been loosening the restrictions on developers, first they started allowing apps with toilet humor and now they have begun approving web browsing applications to the App Store.
It is possible that Apple has separate internal approval queues depending on the category of application, we’ve seen this same type of grouping happen with the toilet humor apps and now we are seeing it with these web browsers.
Apple has until just recently declined web browser because they offer duplicate functionality to what the iPhone already offers.
This potentially opens the door for bigger browsers such as Opera or Firefox to develop versions for the iPhone, inevitably making browsing web pages on the iPhone better for the end user.
Apple Allows 3rd Party Web Browsers into App Store – Mac Rumors.