The University of Wisconsin, Stout has organized a nice collection of rubrics for assessing digital projects. In the collection you will find rubrics for assessing student blogging, student wikis, podcasts, and video projects. Beyond the rubrics for digital projects there are rubrics for activities that aren't necessarily digital in nature. For example, you can find rubrics for writing, research, and oral presentations.
Applications for Education
These rubrics might not fit perfectly with the projects you're students are working on, but they could provide a good starting point for creating your own rubrics. Perhaps you could show the rubric you're considering to your students and ask them for their input as to what they think is important to be evaluated in their projects.