The clue: I've interviewed or featured this person before on my blog.
The date: April 15th
While you're waiting around to read my guest post (and to find out who I'm talking about) why not check out some of the interviews on my blog?
Try the NaNoWriMo Spotlight for the interviews from this year.
Or, try the NaNoWriMo NW Feature for the interviews from last year.