I've just stumbled on the website for Digital Photography School and must say that I'm impressed. They've got a ton of interesting content, from equipment tips to digital photography techniques. They've also set up a Flickr group where members can share samples and compare "assignments" related to the techniques outlined on the site.
One technique in particular, titled "How to Make Digital Photos Look Like Lomo Photography," has really caught my attention. It focuses on a Photoshop method for making digital photos look like they were taken from an old Russian LOMO LC-A camera.
I've never heard of the camera before, but the effects are dramatic. See above for my first stab at the technique. Take a look at the Lomo Assignment on Flickr for more examples.