At least 26 people on digg agree with the following comment:
The impact of finding extraterrestrial life on organized religion will be similar to the discovery that earth revolves around the sun, and in fact not all celestial bodies revolve around the earth!
First the church will deny it, then it will proceed to interpret the bible in some other way.
I think the discovery of life on another planet may cause some problems for some religions. I don't think Buddhism will be affected, I have no idea about Islam, but I think Christianity will be affected, depending on what type of "life" is found.
Maybe we might find some single celled organisms, or even non-cellular life in a puddle or ocean on some far distance planet; if that is the case then I don't see that as a problem. What I do see as a problem for Christianity is the discovery of another species that are like humans. That is a species which subdues the land, has a language, a justice system, creative skills in areas such as music, architecture, paintings and the ability to improve upon advancements of the previous generation in the sciences such as maths, physics and philosophy.
The main question I see for Christianity to ask is: did Jesus died for the sins of the people on this this world, or for other forms of life on other worlds? I think Jesus died for only humans. Jesus took the form of a man and not some other animal, to save mankind and not another species.
This morning my RSS feed produced an article on the logistics of space travel to another earth like planet. There are large distance problems such as so far no valid planet has been found within 155 light-years to support life. And to counter the distance problem you have to travel fast, but as you increase in speed you increase in mass so you need more energy to move, so the faster you want to go the bigger engine you need, which causes more mass that is needed to move. Also space dust could rip a hole in a fast travelling spaceship. Radiation erosion may cause other problems to a space craft that is travelling in space for 100+ years. But these problems might be overcome in the future. I mention this article to balance the recent UK one which is almost definite about life out there and also because this article had an interesting conclusion:
The ironies seem too great to ignore. An obviously spiritual quest accounts for huge research expenditures of both government and private funds. As long as that quest opposes, rather than supports, Christian doctrines, no outcry arises from the separation-of-church-and-state camp.