The ten SFL48 2009 shortlisted films can now be seen on the Sci-Fi Channel website here. Annoyingly you will have to sit through the same 20 second commercial trailer before you can see each one - thanks SyFy. My personal recommendations are the beautiful and stylish "Minute Adjustment" with its' poignant ending, and "Mark Up" which features some simple but well executed special effects and was placed joint second. In different ways I think both these films push the limits of what you can achieve in 48 hours.
Also at this site are the winner "Tracker" and the other second "Glimpse" as well as the entries from the 2008 competition. "Glimpse" features a lot of running - it's exhausting enough just to watch it! - and while the plot is very basic there's some great camerawork and sound and it has plenty of action movie edge.
[update 7.10.09 - link added to Minute Adjustment without SyFy adverts - thanks Rob]