They were 50 meters away last year. January 2012 they were 29. Looks like they still have another year or two to go.
I hope they discover some form of life in the lake. It would be amazing to discover what the evolutionary outcomes would be for organisms in such an isolated harsh environment.
edit: It will only take another year because they're letting the lake water come up through a small bore-hole and freeze, which they will examine next summer season.