Let's see if I can get back into this blogging thing again - I know you've all been missing me. I have been writing all day and have almost 3 weeks worth of posts in the queue - some geeky, some funny and some though-provoking (I hope).
To start with, here's a strange idea I had a while ago. Normally when we think of the past, we think of it as pretty well fixed. We can argue about whether some particular event happened or not but we generally agree that it either happened or it didn't - that there is a right and a wrong answer to any question we can ask about past events. The future, on the other hand, is a lot more debatable. It may be fixed (our free will may be an illusion) or maybe there are many possible futures.
This seems to be a curious asymmetry between past and future. As far as the fundamental laws of physics are concerned, the past and the future are on an equal footing mathmatically. This suggests that either we have no free will or that our ideas about the past are incorrect. Maybe there is more than one past. Maybe the past isn't fixed at all but in fact is actually a superposition of all possible pasts that are compatible with the present.
Furthermore, perhaps the reason that the beginning of the universe is so mysterious is just that if you go back far enough, any possible sequence of events could have resulted in the current universe, so the distant past is a superposition of everything (which carries no information).
This isn't a scientific theory because it doesn't make any predictions, but it might be an interesting philosophical idea to explore.