I have been looking for a solution, but the only format that I can get a response to the profile API is in HTML. That is not very reliable for getting something like a list of the blogger's reading list.
I have been able to get the default/blogs with my auth token and have the result returned in JSON. I then used that to get the author's blog-id .. and then .. the profile (which has the reading list). Howver, when I request it in JSON (i.e., ?v=2/alt=json) at the end of the URI, it still returns HTML.
Is there a better way?