I don't think they did sleep together. Nomad was jealous and thought there was something going on between them, but I don't think anything ever did.
| > Justice is secretly sleeping with a Ms Marvel variant over in Initiative.|
Ultra Girl. They were secretly dating, at least, but we don't know for sure if they were sleeping together. When Justice and Firestar were a couple, Vance didn't have sex with her because he wanted them to wait until they were married. We don't know whether or not Vance is carrying that attitude over to this relationship or not.
| > I didn't know that about Kazar and Mockingbird?|
Back before Bobbi became Mockingbird, she was a SHIELD agent assigned to the Savage Land with Ka-Zar, and the two of them got involved.
| > I didn't know that about Cage and Tigra - or was that just a joke from the Pulse?|
It was revealed in ALIAS that Luke had slept with Tigra, as well as Jessica Drew and She-Hulk. The She-Hulk relationship was established in the HEROES FOR HIRE series, but the Tigra and Jessica Drew flings were off-panel.
| > I hope we aren't going to be counting Norman Osborn, Daken (whatever) and Moonstone as Avengers now? |
I'm counting them for this list since they are part of an Avengers team. Technically the Young Avengers and the Great Lakes Avengers could be on the list too...