Today and tomorrow I (and some of my students) are attending the Virtual Worlds best Practices in Education Conference (VWBPE) which is free and takes place in Second Life, the virtual world. There are a huge number of sessions, with presentations, tours etc. You need to have a SL avatar and the browser installed on your computer to participate.
If you are in the UK, at the moment we are 7 hours ahead of SL time (e.g. 04.00 SLT is 11am UK time). The schedule (giving times in SL time) is on the website. http://vwbpe11.vwbpe.org/
There is one report on the first day here: http://ireport.cnn.com/docs/DOC-574709