Story here, where they live-blogged the event linked to the official Nenana Alaska "Ice Classic" webcam.
Up there you pays you money and takes you chances. But it's only $2.50 for a ticket, on which you predict the date and time of the ice-out, which seems to occur as early as April 20 and as late as, well, today. If you're the closest, you win the kitty, this year over $318K.
Previously scientists were wont to point to seemingly earlier and earlier ice-outs on this river as evidence of the phenomenon of global warming. The long record in this location, however, has shown a cyclicality of its own which on days like today produces silence from that community.
It was like watching paint dry overnight, but one guy did show up all alone in the parking lot to entertain everyone for a moment by mooning the cam, which is fixed on the tripod-like marker placed out in the ice every March for the event.