I noted a few other posts aside from Bluemist's.

Evirus writes: "The best show of Spring 2009 is Hatsukoi Limited. A mostly wistful look at first love, Hatsukoi Limited is a textbook example of how J.C. Staff can succeed wildly when it plays to its strengths."

Girls seems to like it too, see Minnie and Janette.

Kabitzin and Hanners wrote a little each, but nothing too interesting.

And finally, Nova's relationship chart may be useful, if I ever get around to watching Hatsukoi.