Tad Davis, in what appears to be his first post on a new blog, merits a link for the depth of his analysis of Romeo and Juliet while still remaining actually readable. It's not a small novel, it goes maybe 10 paragraphs, but he manages to touch upon the loneliness of Juliet in the second act, points out a few of the more overt sexual references, makes a comparison of Lord Capulet to King Lear, offers some thoughts on staging in the Globe, and even hypothesizes parallels to Shakespeare's own children.
I'm not sure I agree with his opening line that the play "has to be his most heartbreaking one." It's certainly his most popular and approachable (who hasn't been in love with someone that society told them they couldn't have?) But I think that both Cordelia and Ophelia both die more tragic deaths than Juliet.