Idea is to get posts into an multidimensional array and then combine another array (array_merge()) of eg. feed from twitter and then with shuffle() on the third array show the feed soup to the user.
So the main question now is putting posts into an multidimensional array with post data. Second deals with combining diverse "post-like" sources in to an array.
I've got the basic idea, now I'd need some hints if some one has done something similar. :)