The Doctor wrote:On the back left is a model of the twin rovers, Spirit and Opportunity. They both landed in 2004 with a planned 90 day mission Spirit ran for 6 years before it became stuck in some sand, and a harsh martian winter caused contact to be lost in 2010. Opportunity, amazingly, is still going 8 years later.
You beat me to the details
[by a few days] 
Frankly if I were one of the guys or gals who helped developed the MER-{A,B} then I would be ecstatic. Exceeding your planned time is one thing, but those rovers went so far beyond exceeding. I looked it up just now, and the MER-B (Opportunity) is at 3120 Earth days. Developed with a planned goal of 90 Earth days, and it hit 35~ times that? Yeah, I hope they're proud of that one. Here's hoping the MSL is just as successful, baring any soft soil or other "oh crap I'm going to get stuck here
nooooo" types of terrain or elements.
Random info perhaps interesting to some: the MSL's powerplant is technology that was developed 50+ years ago. That part isn't interesting; the original Atlas launch vehicle design was from the 50s. The part I find awesome is that the powerplant (fancy name: radioisotope thermoelectric generator) has zero moving parts and an incredible life span. It's basically an electrical generator powered by radioactive decay. Life span is obviously necessary for space travel, but the total life span (based on the isotope used as fuel, in this case Pu-238) is good for 80-some-odd years. It decays over time of course — it loses an estimated 16.6% power after 23 years (had to look that bit up) — but I
still think it's awesome to this day. Ionizing radiation and nuclear physics, woo! Somehow it's just sort of, well, more cool when applied to space travel rather than terrestrial use.
As a counterpoint to my ramble(?), here are a pair of recent photos. They're a day or two old, but I figured it's worth posting since not everyone follows this stuff beyond the initial "woo," and so they may miss out on 'em.
MSL's initial goal: Mount Sharp (aka less-than-exciting name)

360° color panorama of Gale Crater (MSL's landing site)
