Finding user profiles on a Social Net

I was thinking about the issue of finding user profiles on a social net,
and it's not always easy to know where a user's data will be located.
There seems to be no well known place to get user information from a
profile.  Which means it's harder for HTTP based social web users to talk
to each other.

One increasingly popular method is to use the /.well-known/ directory.  The
disadvantage of this approach is that is it pretty rigid and people say it
amounts out of band hard coding.  However one advantage is that it can save
a round trip, compared with follow your nose, and it can client
implementations more straight forward.

Taking the well known directory a logical pattern might be to register:
*
*
*/.well-known/user/bob*

For the FSW?


*Would it allow redirects* -- I would say yes.

*What would it return* -- I would suggest linked data.  Ideally a browser
would see html and an ajax request would see JSON, but you could start with
just one of the two, say JSON only.


Good idea / bad idea / too hard to implement ... thoughts?