We watched the film "Primer" tonight (imdb link).
Pretty nice actually. And it's impossible to tell anything about the story line without giving away too much! :-) It's sci-fi in current time, me like. A little like a fantastic book I read some years ago called "Trigger" by Arthur C Clarke and Michael Kube-McDowell (link to Sci-fi bokhandelns description, in Swedish), but when it comes to the actual technical details - not quite like it... :-D It's impossible to describe.
It's a little "ambitious", as in a bit difficult to follow at times. And it's sure low budget. It's another dialog-based film, there's not a whole lot of action. But it keeps you interested throughout, so I recommend it warmly.