I watched this a couple of weeks ago - it's currently showing on the Sci-Fi channel here in the UK.
The film is piss poor, but the chap with the Amiga is brilliant! In a nutshell, the Amiga 4000 saves planet earth when the big government system "runs out of memory". It transpires that this dude has done all the necessary calculations on his Amiga. They even have to find a video cable to plug it into their systems!
Amiga saves planet Earth. The end.
AndyC