The OERu has started to use the OnlineGroups.net service (a commercially hosting service using the open source GroupsServer project created by the same company) for group-specific mailing lists. The service provides an Atom feed for the groups which is integrated with their search interface http://groups.oeru.org/s/search.atom.
|s||urlencoded search term|
|a||anonymous user (?)|
|t||include topics (default 1)|
|i||initial offset (skip posts)|
|l||limit number of posts (default 6)|