BuddyPress.org

@xrun this should get you started https://buddypress.org/community/groups/bp-profile-widget-for-blogs/ for more customization as far as bringing in the “send message, follow, etc.” that would need a little more time and effort in getting the blog owner ID and relate it to the bp user and his profile actions you are looking to add, which it sounds like you want the member profile id card in the users blog sidebar. try the widget plugin first…it might be satisfactory enough. if you contact the plugin author he may even add some more of those features.