Log into multiple wireless networks

If the need comes to be able to log into multiple wireless networks(places where multiple hotspots could be found), then use this still-under-development Virtual Wi-Fi software from who else but Microsoft:
http://research.microsoft.com/netres/projects/virtualwifi/software.htm
My primary interest in this software is that it is from Microsoft and it is Open Source!! In the past one year, there have been many open source programs from Microsoft or Microsoft employees, some of which are even hosted on SourceForge.net - world's biggest repository of Open Source software. See this for an example.