It’s important for a lot of WPMU sites to be able to show, or monitor posts and comments from across the site in one place.
Likewise, it’s great for community to be able to provide a blog directory, show latest posts, global search or nice widgets displaying all of your users.
These plugins have been developed with that in mind, and allow you to bring a whole number of blogs together as a cohesive whole:
Ning To BuddyPress
Allows you to do a full import of a Ning network's users, their custom profile fields, and avatars to BuddyPress. Full support for very large member lists via optional FTP upload and batch processing.
Members Directory
Would you like an automatic list of all the users on your site, with avatars, pagination, a built in search facility and extended customizable user profiles? Well, you've found it!
Global Site Tags
This powerful plugin allows you to simply display a global tag cloud for your entire WordPress Multisite network. How cool is that!
Global Site Search
A magnificent plugin that allows global search across all blogs on your WordPress Multisite / BuddyPress install with ease!
Blogs Directory
This plugin provides a paginated, fully search-able, avatar inclusive, automatic and rather good looking directory of all of the blogs on your WordPress Multisite or BuddyPress installation.
Global Comments Feed
Provides a global feed of comments from a single author made across multiple sites on your network
Global Author Posts Feed
Provides a global feed of posts from a single author made across multiple sites on your network
Moderation
Moderate posts, comments and blogs across your WordPress Multisite install with this handy and extremely powerful plugin - if you're running a news or publishing site, this is a must!
Recent Posts
Allows you to display a list of recent posts on your front page without needing a widget - it's a great way to create a front page 'river of news' from content across your site!
Recent Global Comments
Provides a global feed of latest comments from all the sites across your entire network - for your clients, your users or yourself.
Recent Global Posts Feed
Provides a global feed of latest posts from all the sites across your entire network - for your clients, your users or yourself.
Recent Posts Widget
A widget that shows recent posts from all the blogs across your entire Multisite installation - hugely powerful and massively configurable!
Recent Comments Widget
Display all the latest comments from across your entire WordPress Multisite network - using a simple but powerful widget!
Blogs Widget
Show recently updated blogs across your site, with avatars, through this handy widget
Users Widget
Show a nice list of random users from your site, with avatars, wherever you want with this handy widget
Reports
Displays post and comment activity per blog and per user
Blog Types
Allows you to categorize blogs and create your own verticals or even multiple, category-based, global dynamic front pages within a single Multisite network!
User Activity
Collects user activity data and makes it available via a tab under the Site Admin
Post Indexer
Indexes all posts across your network and brings them into one spot - a very powerful tool that you use as a base to display posts in different ways or to manage your network.
Comment Indexer
Indexes all comments across your network and brings them into one spot - a very powerful tool that you use as a base to display comments in different ways
Blog Activity
Collects data on how many blogs were updated in the past
