BuddyPress.org

is it possible to write blogposts …

… viewable only for me (this could be a draft)

… viewable for a closed Group

… viewable for registered users

… viewable for all

I also like to have the possibility that there is one mainblog and every group and user has its own blog. Blogposts marked with a special tag would appear automatically in the designated groupblog and everything vieable for all will be shown in the mainblog.

Is this possible with WPMU 2.9.1 and BP 1.2? And maybe aditional plugins?