I was chatting with a colleague the other day about the most effective way to create a list of online Mathematics resources for our school. We were both thinking of delicious as we have a significant number of teachers with accounts. The idea was to use a group of teachers as the "curators" of these resources and tie them all together in some way. Initially, my colleague figured starting a new delicious account perhaps under the name lnpsmaths might be the best approach. But the problem was sharing the logon and password with the others participating in the initiative - and delicious works best when you are constantly logged on, see the resource in the course of the working day, then hit TAG without too much thought required.
So, using the power of tagging, we decided the best and easiest option is to use a unique tag to tie all of the saved resources together regardless of who was doing the tagging and saving. This way, even the teachers who are not using delicious (even though we are getting closer to total staff participation) can just have a shortcut to http://delicious.com/tag/lnpsmaths on their EdPort homepage to benefit from the Mathematics focus group's hard work.The only glitch we've discovered is that the same site can be saved by multiple users and it will show up each time as a separate entry on the list. Our stopgap solution is say the first person to find the site uses the unique tag, and others can save but avoid the lnpsmaths tag.
Now none of this is ground breaking or unique, but it showcases the simplicity of the way delicious works (I think it is quite a bit simpler than diigo and most staff are not power users of social bookmarking at this stage) in a very powerful way. Now, we have a hotlist of sites that is constantly growing, anyone can contribute and it gives using digital resources in the teaching of Mathematics a real vitamin hit.