Please see <dev.civicactions.net/?q=node/114> for my
initial write up of the "Taxonomy Cloud". This is something that is a deliverable for CivicGroups and we will begin coding early next week. Please comment at <dev.civicactions.net/?q=forum/34>
I get errors when I try to login with a Drupal ID.
This is a problem with CivicSpace I believe - this is just a vanilla CS install - I logged it as a bug over there.
I would recommend using "Easy News Topics" (ENT) [1] for this. It was discussed (briefly) on Drupal.org [2] quite some time ago. This does require RSS 2.0, but that is something that we need to implement in any case. Paolo's been talking [3] about it lately again, too (it sort of intersects with Technorati tags, but don't get me started on that).
[1] http://matt.blogs.it/specs/ENT/1.0/ [2] http://drupal.org/node/1655 [3] http://paolo.evectors.it/
I'm copying Anslem on this who is doing the programming. We're pretty interested in sticking with RDF, but we're not religious :).