Use of Web 2.0 tools in adult education

Hello all,

I have been reading through existing forum discussions but not yet quite found what I am looking for. Maybe you can help. I am looking for examples of good practice using Web 2.0 tools in adult education. Tools I am particularly interested in are: blogs, wikis, social bookmarking, image and video sharing, google pages/docs/groups, skype, podcasts...
I am looking for very brief case studies/examples/ideas of how web 2.0 tools can be used to enhance teaching and learning in adult education.

I work on developing materials for a free staff development training programme in the UK. We work with practitioners from all different curriculum areas, who work with adults in different settings (including local authority education, work-based learning, offender learning and skills, voluntary and community sector). Some work in high tech training rooms, others work in church halls or community centres. It is a real mix of people in different situations.

The point is to create a document listing lots of different ideas and examples in order to illustrate how versatile these tools can be, and to inspire practitioners to find out more and give them a go in their own practice.

If you can offer any suggestions or point me in the right direction I would be very grateful!

Thanks
Sarah