I registered this because it was available, and I wanted a name within it for my pet project - Richard Robinson's TuneBook.
But obviously, this namespace has room for a lot more than just my stuff. If you have a site doing something for which a "myothersite.tunebook.org.uk" name would be helpful, mail me the current name of the site, and the name within tunebook.org.uk that you'd like for it, and I'll do the DNS thing to make it happen if it seems reasonable.
Richard Robinson 2010