I am still holding out that they will regain full signal. as it stands right now, they DO have contact. It rover has sent up tones indicating that 'yes, I'm still here. Yes, I'm still working. But, my tummy hurts, and I need some attention'. It has a problem, and possibly a serious one. No way to be sure how serious, yet.
There are two more orbiter 'swing-by's tonight, and if there is still nothing more then the tones for 'serious anomolies' THEN I'll start to worry.
As far as what we have gained, I think it has done a fair amountof true science inthe last 2 days that hasn't been released because they are busy trying to get it running again. Also, a LOT of science was accomplished just by getting the damn thing to land SAFELY, open, operate it's instruments, and roll. It means the airbag idea works, NASA can do a DAMN good job of aiming a rover (it landed EXACTLY where it was supposed to) and they have a design that, essentially, works.
Oh, and I do agree that if it was manned, the problem that is occuring now, whatever it may be (aside from the martian army attacking it) would stand a MUCH better chance of gettingfixed/resolved if there was a human or 5 present to fix it. I'm not saying by any means that manned missions are unflawed, but they are FAR mroe capable of dealing with problems as they arise. The rover can't really tell us what is wrong, nor cna it fix 90% of the things that may be damaged/inoperable.