As an ex-NASA guy (seems way back to me now) I had to check this out when I saw the write up on CNET. Its pretty cool! Well designed and laid out, not trying to do too much but doing a good job with what it does do. The app give you updates on various NASA efforts including RSS feeds, pics, movies, etc.. You can also track where the International Space Station is, a few count down and count up clocks, (as with the rovers), and some other random coolness.
Unless you are a full NASA nut, I’m not sure how often you would check this app, but for someone who followed the mars rover adventure, and can you believe they are STILL going?, its kinda cool.
Its a free app so download and explore… and now, the screen shots..