Water on Mars: discovery of three buried lakes intrigues scientists
IMO, I don't think it should be a surprise that we will eventually find signs of extraterrestial (but not necessarily intelligent) life in our solar system. The real question is: does it share any common building blocks with life on Earth or not?  The answer to that question could dramatically change our understanding of our place in the universe as well as open up entire new fields of productive research in biochemistry.