This isn't a suggestion, but I'm wondering if any member has a random featured photo on their home page?
It was discussed on the Boonex forums and someone wrote some code. Sadly it was for a very old version of Dolphin and it probably won't work now.
The discussion was for a simple block containing a random featured photo, the person's name and a link to their profile. The consensus was that it would brighten up the home page and I agree. This needn't ne a module because it would have a singular task.
Maybe a tutorial could be created which could allow some of us to use the concept in other ways?