Today I got an email from the Yahoo podcasters group mail. It was a long time since I could remember the last. But at one point, the group was very active with usually a daily digest appearing. And at that time it felt like a real community, of people from different countries and contents with different kills and knowledge reaching out to help each other.

As podcasting has become established there is a wealth of help available online, videos and manuals as well as specialist software and hardware. Podcasting is not longer a frontier sport. And the community is no longer need, or at least it no longer plays the same function.

And I wonder if that is true of other communities of practice. Etienne Wenger has suggested that communities of practice are always emergent (a point protecting them from making a fetish of conservative and out of date practices). That is usually taken to mean through membership, with new members becoming central as others move to the edges. But it may be that communities are always emergent in the knowledge and practices which constitute their base. And when that knowledge and practices cease to be emergent - as in the case of the Yahoo podcasters group - unless the community can move on to new emergent pastures, then it simply slowly dies.