Apparently there is an IGN app on Windows Phone. For all else, I guess you would have to rely on internet browser. Youtube third party apps may work for some livestreaming of conferences.
Thanks, I found this as well. It was published last year and apparently they are going to use it again this year.
http://www.windowsphone.com/en-us/store/app/live-video-player/0ae9f9fa-29b2-4318-845f-4e24ce52ca94