I don't think this has been posted here yet. Or anywhere for that matter.
Allan Heinberg at the "Gays in Comics" panel at San Diego Comic-Con revealed that yes, Hulkling and Asgardian are boyfriends. He wasn't planning on making it part of the story until issue 12 or so, and was a little shocked that everyone got the innuendo that the artist put in so quickly.
http://www.comicboards.com/avengers/view.php?trd=050720043047