Yeah, that wheel has been sticking for about 6 months... the solution up until now has been to drive in 'reverse' and drag the wheel, then spin the rover in place for the major instrument package to point at the 'forward' stuff. Redundancy is good.
I'm surprised to hear they've obliterated the grinder teeth and are just down to brushes on the Rock Abrasion Tool... them's some tough martian rocks.
The solar panel dust buildup issue was predicted to cause the early doom of the rovers before launch... fortunately, both rovers have benefitted from serendipitous dust devils which have seemingly blown them clean. Here's hoping the same trick will increase power again in future.
Hibernating with optimal panels-facing-sun worked last year, so I'm not pessimistic, but if you read some of the coverage, Squyres is giving the press some pretty
drastic sounding sound bites.