Jailbroken iPhone - Wireless Access Point

Question

Hello,

Within my iPhone application I wish to add the ability for other devices to connect via WIFI, and share the 3G connection of the phone, essentially turning the phone into a wireless access point similar to what MyWi does.

As I said; this functionality is to go on top of other application functions, so simply using MyWi isnt an option for me at the moment.

I was wondering if anyone could help me out, what prior knowledge do I need in order to:

1. Write a deamon on the iphone
2. Access the phones WIFI interface
3. Allow other devices to authenticate securely (WEP or WPA)

Any hints or tips, or links to further reading would be more than welcome.