While the Polaroid corporation stopped production of the bulky cameras in February of 2008, you can still find a few in stores. Or just try Poladroid.
Poladroid creates Polaroid-style images from your photos. The UI is a lot of fun. Drop your photos onto the Poladroid "camera," and after a few seconds, it spits out your unprocessed print. Watch it slowly "develop," or speed up the process by -- you guessed it -- shaking vigorously.
You can create an image at any stage in your print's development by double-clicking and selecting "Take a sample." When your print is fully ready, a red "x" appears on the bottom.
This application, while in beta, is a whole lot of fun. I dropped a dozen pictures onto it in the first five minutes and the results are just great.
I'm really looking forward to the progress of this little app.