http://www.sherdog.com/news/news/report-lesnar-out-of-ufc-106-20560
I was really looking forward to see what Lesnar could do finally fighting someone his own size
edit: Here is the Yahoo article
http://sports.yahoo.com/mma/news;_ylt=AjMyR3Nu6rzGdmsgtG7MfpQ9Eo14?slug=ki-lesnar102609&prov=yhoo&type=lgns