While it is free to register as an Apple developer, you have to join the IOS developer program to become a registered iOS Developer. THEN they give you the access to the approval guidelines document, some technical support, allow you provisioning iOS devices, and to put applications on the iOS app Store.
We have some unofficial (take them at face value) resources (some of them I have pillaged and others were provided to us by the game research firm, EEDAR).
The Approval Guidelines – from 2010. http://files.netcommunities.com/newsletter/thinq/asg.pdf
*Note, that this is a “living document” and may have had many revisions since 2010
This site gives an estimate of the current average processing time to get approval – http://reviewtimes.shinydevelopment.com/
Aleshia
Goody Two Shoes Media 
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