Castro actually turned 79 not 80.
He was born 1927, but his father bribed with 100 pesos in 1941 to get his age changed so he could attend a higher school.
Castro never corrected the change because later 26 was an important "revolutionary" number.
No, he's dead.
Pictures of him holding a recent newspaper article but no video?
http://news.yahoo.com/s/ap/20060813/ap_on_re_la_am_ca/cuba_castro_17
Him being alive is about as likely as their copy of photoshop being legit.