QUOTE(torka @ Aug 18 2008, 06:17 PM)

Sounds very much like the sort of thing you can get from
Google Alerts for free.
And, yes, I've set up quite a few Alerts, and they do bring back useful news reports, blog articles, forum posts etc. on the phrases I target. You may have to play with them a bit at first, maybe add some negative keywords or something to fine tune the results, but with a little tweaking they work very well.
--Torka

Thanks so much Torka!
Actually I was searching for a professional-managed service, but if you say that Google Alerts is useful in order to have information about a precise topic or a precise brand, I'll try it!