I'm following the launches, the landings and the spacex reddit regularly, as well as the Orbital Mechanics podcast, so you could say my interest is above average.
I'd like to note that the Mars 2018 is
an umanned expedition, and mostly a proof of concept for SpaceX. They will roll out their havy launcher, the Falcon Heavy late this year, and the FH will launch the test mission for their Red Dragon capsule (based on their currently flying Dragon 1) in 2018, and then simply send it all the way to Mars on it's trial run. Simply put, it might be ambitious to get that going by 2018 - space is hard work, after all - but it's a surprisingly low effort operation, since it simply utilizes their future "off the shelf" equipment. What's still up for debate is what kind of cargo the Red Dragon will have. It will be by far the largest vessel that has landed on Mars, it will land propulsively, which is awesome. And later potential customers can simply buy a new flight using the same standardized craft and architecture.
Note that SpaceX is the only provider of launch vehicles which have open prices on their site, and note that they already have payload capabilities for Mars missions listed:
http://www.spacex.com/about/capabilities
Finally, the most exciting cargo for the demo is a small, two stage rocket that will be launched from the Red Dragon and return to Earth with a small payload of samples. Which is awesome.
Their first manned mission is tentatively set for 2024 or 2026 (I think), but we'll know more about that in september when they unveil the architecture of the Mars Colonial Transporter.
Oh, and they're trying to land yet another rocket on wednsday. It has somewhat poor odds, considering the high-energy mission, but I'm still excited.
Never let perfect be the enemy of good. I don't see why living better here and exploring space is seen as diametrically opposed goals. Mankind use more money on makeup than rockets, ffs, but somebody using makeup rarely get told that they should focus on making the world better instead.