Good question about deep linking. I’m not sure. Don’t have any experience with it personally.
I don’t have any plans to turn this into a service. It’s just one of the UX ideas I came up with when designing BetaList.
Someone did reach out to me yesterday about turning this into a service, although I think that might be overkill.
I do hope someone will create a simple jQuery plugin that can recognize host names and show the appropriate link. It would cover most scenario’s and would be relatively straight forward to implement for any developer.