So the only thing users gain with delegation is that they don't need to remember the tedious URL that their provider assigns them. When they switch providers, their claimed ID will still change, and they'll have to reregister in all services they use.
No, the whole point of delegation is that I can use voidspace.org.uk as my openid - backed with any provider I want. I can then use voidspace.org.uk as my openid and not be tied to any provider.
I'm fairly skeptical that you actually do use voidspace.org.uk. I can believe that this is what you type into the openid field - but the ID that is validated to the relying party is http://fuzzyman.myopenid.com/. So when you change the provider (and hence the openid.delegate value), you will have to create new accounts for all services that you use, right?
I'm afraid the PyPI implementation of openid is useless to me too - I want to use voidspace.org.uk as my openid but it doesn't let me.
See above - the services may let you *enter* that string, but it isn't your openid. Regards, Martin