OK i have decent amount of knowledge of C++. I want to make cool games for iPhone using unreal engine and I have access to UDN. But everything seems cluttered on UDN. I have downloaded source from there. It would be great if someone can provide information about How to get started and list of resources. Thanks!
You can start of with any tutorials you like(even non-Mobile). First your goal should be getting used to with development environment. If you want to deploy you game to iOS devices then, you just have to follow constrain of that device.
UDK Mobile documentation! a forum post you might miss.
A full game Jazz Jackrabbit UDK iOS Tutorial
3dBuzz has some tutorials of on Unreal Editor too.