On collaboration in particular, I would add that often, when government agencies or political parties have tried to launch collaborative sites, at least in Denmark, they’ve found that there are currently relatively few people interested in taking part. Danmarksdebatten.dk, for instance, won various prizes, only to disappear into the ether. Look at radikale.net, which is technologically impressive, but seems to have a low level of activity. This is not to recommend against it, but to underline that in Scandinavia as elsewhere, tools alone only foster collaboration in so far as a critical mass of people have an itch to scratch. If not, you have to be very patient and careful in creating and fostering a community.