Some people here will certainly already be familiar with SOLIS (The Panspermia Society) http://www.panspermia-society.com/. From what I can gather, the guy running it wants to plant seeds and microbes on planets hundreds of light years away so that life will exist in space once the Earth is swallowed by the Sun in a few billion years. Sounds great, but isn't this biting off a bit more than we can chew? Why not start locally with a project that is currently feasible? How about landing and releasing large vats full of (Antarctican) bacteria, microbes, algae etc. on the Moon, Mars, Mars' moons, and the moons of Jupiter and Saturn for starters and see how things evolve from there?