I think that I found a new, interesting looking SciFi film that will be coming out later this year. Thus far, it's been under the radar, but from the couple (and only) places that I've really found any mention of it, it looks like there's a considerable amount of anticipation.
The movie is called Sunshine, and it's being directed by Danny Boyle, who is known for his movie 28 Days Later. It's also written by the same person. Now, I've heard a number of good things about 28 Days Later, so that certainly piqued my interest.

Here's the plot summary from the official weblog of the movie:

The Film
The Sun is dying, and mankind is dying with it. Our last hope: a spaceship and a crew of eight men and women. They carry a device which will breathe new life into the star. But deep into their voyage, out of radio contact with Earth, their mission is starting to unravel. Soon the crew are fighting not only for their lives, but their sanity.

Empire Magazine also posts up this brief summary:
The sun is dying. A team of astronauts have been sent to re-ignite the first failing spot, but communication with them has been dead for some time. A second team are sent to complete the mission.

Okay, it's a little on the "this has already been done before" side, but I'm getting the feeling that this isn't a disaster movie, and that it's going to be a lot more interesting than just that, at least, one can hope. Looking through the official blog, there's mention of the types of solar radiation that the sun puts out, Akhenaten, an Egyptian Pharaoh with mention of the sun worship and achievements that the egyptians made with calculations and the like, the lifecyle of a star, and creation of the universe.

So, in my opinion, this looks to be one to keep your eyes out for. Could be very interesting. This is their official weblog: