Wow, thanks everyone. Like Shelagh says, I've got a lot of support and am doing fine. He'd been sick for years (lung cancer... non-smoker) so we did have plenty of time to prepare. Doesn't make it any easier really but at least it didn't come as a shock.
DR, that's a really good idea. I think that I have a Gandalf mini lying around somewhere that should do the job. He loved Lord of the Rings, so much so that he read it to me at age 4, and Gandalf was probably his favourite literary character.