I came across this Finnish movie recently and thought it was very funny. It's in Finnish with English subtitles. Great if you are a fan of both Star Trek and Babylon 5 (the greatest sci-fi show of all time, IMO).
The first 6 parts of varying length and quality are here and are all Star Trek spoofs:
The first few are animated and use video game rendering from Star Control, but the last few are live action and they get much better.
In the Pirkinning is a feature length movie that took 7 years to make and is now the most popular Finnish movie of all time (an amazing feat for an amateur film). You can buy it at http://www.starwreck.com/ or watch a lower quality version here: http://video.google.com/videoplay?docid=5504660695876228465
The special effects are actually quite amazing. I would say it is worth buying the full quality version just for that, but the story and dialogue is also pretty good as well. It continues the story from Part 5, but you can get by without watching any of the older installments if you are not interested.