The Emerging Technologies conference is over and I am packing up to leave. Before I finally unplug my notebook PC, I must say I wish I had brought my iBook as well. I missed out on using an interesting Mac OS X-only application called Hydra, which lets a group jointly edit a document in real time. At ETech, more than half the audience used their computers throughout each session, with a number of them blogging live, such as Timothy Appnel and Tim Oren. (I was going to mention Paula le Dieux, since she was sitting next to me, but I can't find her blog.) A lot of people were, of course, simply taking notes. This time you had groups of people taking notes collaboratively, sharing a single document, using Hydra. This gives you the flavour. (Trevor Smith is the hero.)