I’m watching the keynote from Google I/O the other day and it’s impressive stuff, technically at least. I can count on the fingers of one hand the occasions I’ve wanted (or needed) to collaborate on the same document in real-time with anyone, but I shall curb my natural cynicism. The mere fact that they are releasing a large part of Wave as “open source” (no mention of actual licence as yet I don’t think) makes it all an order of magnitude more e…