Display a listing of posts using the [display-posts] shortcode allowing multiple network instances.
Based on development by Bill Erickson (http://www.billerickson.net/shortcode-to-display-posts/). We have added support to multisite in order to be capable of reading any other blog in the network.
The DeMomentSomTres Display Posts Shortcode was written to allow users to easily display listings of posts without knowing PHP or editing template files and extendend to take the maximum profit from a network install with multiple blogs.
Add the shortcode in a post or page, and use the arguments to query based on tag, category, post type, and many other possibilities (see the Arguments). I've also added some extra options to display something more than just the title: include_date, include_excerpt, and image_size.
Add the parameter blog_id to change the network instance number.
See the WordPress Codex for information on using the arguments.
A customer of us needed a multisite website to implement multiple languages and she was using DeMomentSomTres Language Plugin. Although they could have many blogs they didn't want to keep 3 blogs informed. However they wanted to show the blog in all the subsites. So we build this plugin allowing to show blog content from other sites in the multisite installation.