More suggestions on practical exercises to teach listening skills are in a nice blog post from Teacher's Tonic.
I am in the process of investigating the best way to set up a web resource for educators to share with each ideas, experiences and suggestions so that we can establish a body of evidence and some best practice guidelines. At the moment we're thinking a Google Group. I am trying to capture email addresses for all the educators who are contacting me through my blog, email, Google+, Facebook, Twitter... quite a task but it will be well worth it! Email me at firstname.lastname@example.org if you'd like to be involved.