iBook as a Wireless Router in a Hotel

This may not new and some of you probably already know it, but I tell you anyway. In mac OS X, there is a function call Internet Sharing, which - pretty straightforward - shares your internet connection on your Mac. My buddy visited me in my hotel room to find I brought my iBook and my office laptop (a Thinkpad). He brought his MacBook and wanted to connect to the net, and he turned the sharing in my iBook that was connected to the hotel network. And he found the performance was acceptable. I was excited, so I opened up my Thinkpad and I saw my iBook as one of available network. I managed to connect and yes, the performance is acceptable.
Now I had my iBook always connected in my room and also use it as my personal wireless router. Very cool!