I've decided to venture into Patreon, a site which offers writers a model for public subscription patronage. At the moment I'm still finalising my page, but when I'm done the address will be:
http://www.patreon.com/davidrose
(launch should be in a few days; definitely before this weekend!)

I'm planning to use this blog to share my experiences, in case any of you are interested in trying it as well. I'll also be posting the occasional update.