I'm pretty sure this is the first i've heard of it but for those of you who don't know,

Ryan Dunn has died... ****.

more info:
http://www.huffingtonpost.com/2011/06/20/ryan-dunn-dead-jackass-star-car-crash_n_880322.html
It seems official but if it turns out to be fake, i'll look like a jackass...ohshnap.
In all seriousness, RIP Ryan.