Not much to say on this one (they don't have an English language interface yet) but Redball.info from Austria has launched a new engine that claims to provide searchable access to 100,000 newsgroups, and 90,000 mailing lists. Lycos recently launched a "discussion search engine" that Chris reviews here.
A bit more about Redball.info in this news release.
Optimising Digital Marketing Campaigns with Search, Social and Analytics
At SES London (9-11 Feb) you'll get an overview of the latest tools, tips, and tactics in Paid, Owned, Earned, Integrated Media and Business Intelligence to streamline your marketing campaigns in 2015. Register by 31 October to take advantage of Early Bird Rates.