I took it to mean 48 hours from the time you see the themes, but there aren't many games uploaded and the themes were announced 51 hours ago. So *shrug*
It takes place over 72 hours, so that people from all over the planet can easily get a 48 hour window in. We don't mind at all if you use more of the time to make your game - while it's intended to be 48 hours the spirit of the jam is to just build rad stuff and have fun, so if you're still going then by all means carry on!
