For many years I've run my own host for this website. Well no more. I'm now using those nice people at A2 Hosting. I was put on to them by Merlin at 43Folders.
So, far so good. They've been very responsive (every time I wanted a new Perl module added, etc). The only problem I'm having at the moment is getting Django working (as the don't support mod_python)
Consequently, I've abandoned my implementation of GTD and started to use Tracks which is a Ruby on Rails implementation. I don't know Ruby (and I don't really have time to learn it), but Rails is well supported by A2 Hosting.
