[dkuntz2]

While a cool idea, this places a lot of overhead on a professor who most likely already has a bunch of other stuff they need to get done (even at tiny liberal arts colleges).

Expanding on your idea, collectively, or in small groups, students could build that website. From the idea stage to the production stage.

[TheBiv]

I do completely agree that there is a lot of overhead on the professor, but I tend to believe that any professor that would like this idea would be able to rationalize spending a weekend to be able to explain what she created all semester. I can't imagine a cooler lesson plan than detailing your design decisions as you made them.

[dkuntz2]

Presuming it takes a weekend to solve some sort of problem that at least some other people have. Presuming they're not only a couple weeks ahead of their students in the course's material.