I thought you guys would enjoy a "how to break Cisco's LEAP authentication" video using only Windows XP/sp2 and win32 tools.
http://www.vestivus.com/video/MTEwNg__(don't forget the __ at the end) or you can use this URL to find all of my Vestivus videos:
http://www.vestivus.com/director/Devin+AkinIt covers how to configure LEAP on the client and AP, how to capture a LEAP authentication using a protocol analyzer, and then how to convert the capture and use the 2 parts of the ASLEAP tool to break the LEAP authentication (to get the usernames and passwords).