#2 Jan 13, 2009 19:53
If you are running a 2.x series of B2evolution, you can assign one (new) blog to be aggregate blog of the others. That way you have a list of all posts but also an rss feed for all of them. Next thing you want is to modigy this aggregate blog (show only title or only excerpts).
You can also choose to archive in widgets in the sidebar. Look for the posts list widget.
If the various blogs are on different servers and/or you have several installs of B2evlution, you may consider changing your setup or you may turn to third party tools to collect feeds.