In the past I've considered Moodle wikis to be a bit clunky, but they're growing on me a bit. It's better to use group pages, because different groups trying to upload to the same page just takes too long.
Having the groups auto-generated seemed nifty, but then I got to a class and discovered that four students who were not shown as absent on the computer were on retreat, and the groups were lopsided. I didn't have time to reconfigure the groups. I only needed to move one student. She was not on the right page anymore, so her partner did the uploading.
Students explored websites of organizations to make connections between their work and themes of Catholic Social Teaching. I told them that if they had time they could "make it pretty" and upload photos, and most groups were able to do so. We then viewed each wiki page while the group explained their findings.
Not bad for a period's work.