As journalists get used to the idea that their own platform - radio, TV, website, newspaper - is just one among a multiplying number on which people are expressing themselves, it's handy to have an update of what's out there.
Below is a 'Top 100 Tools for Learning 2009' compiled by Wiltshire-based social learning consultant Jane Hart after canvassing 278 associates worldwide. Sooner or later, you're going to find yourself hearing about something important through one of these channels.
You can see the full list in table form here. How far down it do you get before you hit one you've never heard of?
(Slideshare, on which this is hosted, is at number seven in the chart.)
