Hi Kyle,
As you know, I am currently building my stream into a followingonly stream. One of the problems I have is getting people to join the groups as they are only browsing the main newsfeed. What I thought would be cool would be to have the possibility to include a third party module into the activity stream using {loadmodule} feature of Joomla or any of the various other plugins (Modules anywhere etc).

Here is how I had imagined it: Activity module has a settings which allows you to include a blank activity into a position on the stream (eg 3 and 6). The user can, if he wants to, put in a {loadmodule} that would then be displayed there (please exclude the HIDE possibility )

I wanted to put there the groupjive module so that people can randomly follow other groups OR I could also imagine putting an advertising module in there.

I think that would be an amazing addition to the activitiy stream (especially for mobiles)

Hi that goes already a long way if you can show the groups in random order.
I had mostly asked the question with reference to mobiles where it is next to impossible to display two modules (one of which is an activity stream, one which is Groupjive modules) next to each other.
Since stream is "endless" you cannot put them one below the other either, so the only way really is to have it scrolling sideways inside the stream. It is different than the advertising feature you are talking about and would go a long way to already implement something.