You can now share an internet connection among multiple computers in your home, even if you do not have a wireless access point or wireless router hardware – as long as the computers are running Windows 7.
You can now set up a wireless ad-hoc network (computer-to-computer network) WITH internet connection sharing!
At home, I use a Nawras Huawei E220 3G USB modem, which can only be used to access the internet from the PC on which the modem is physically connected. Thanks to Windows 7, my wife and I can both use the internet at the same time using just one modem on two different computers without any wires or extra hardware! 🙂