What info do I give to someone so that they can contact me, and do video-chat with me, on Windows Live Messenger?  My Email Address, that's part of my Windows Live ID, that I use to Sign-In?  Something else, that in effect, is my UserName or UserID, at least for Windows Live Messenger purposes?  Other than my own Windows Live ID that I created & use to Sign-In, I don't recall or have any record of having created, or having assigned to me, anything that might constitute a UserName or UserID, if there is such a critter.  If there IS a sort of UserName or UserID, at least for Windows Live Messenger purposes, that I've forgotten-lost ... and ... IT is the info I should provide to others I meet face-to-face with while traveling ... then How or Where would I find or recover this info?  When I setup Windows Live Messenger on my Desktop, I did do the auto-send of multiple invitations to the folk I selected from my Contacts list, but that was a quick auto task, versus handing out the info needed, to someone in a face-to-face meeting, so they can initiate a video-chat session with me at some later time, using Windows Live Messenger.  Want to be completely accurate about any info I add to my printed business cards.   If not completely obvious by now, my only use, to date, of Windows Live Messenger, has been as the recipient of incoming video-chats from a few of the Contact folk previously auto-invited by me during setup, & that's been less than 5, total.  Will begin new round of extended travel in about 2 weeks, & just dawned on me that I better nail this down, now.  Thanks in advance! 

[Both Desktop & Notebook:  Windows 7 Ultimate SP1 64Bit, with Microsoft LifeCams; iPhone 4G using Messenger app.]