So ... the easiest way to create a WiFi network on Windows 7 is using ICS.
However, I'd like to create a simple WiFi network to make my computer work as a router. In Linux (generically, but I've done this in Ubuntu 8.10 or so, with atheros) you can set your WiFi card into "router" mode.
Why do I want to do this?
I can't make my Kindle connect to my PC otherwise. It needs a WiFi network, and I have only got an ad hoc network in my home. (Note: I'm using the latest, 3.2.1 firmware on the Kindle.)
My WiFi card: Intel 5100 AGN 1x2 MC Wireless WiFi Adapter (Lenovo - MOW2)
Host OS: Windows 7 x64 SP1 - Professional
I don't mind a solution that costs, except for buying a router.