Hi Brueggers,
NoticeCast was designed to be used with the Series 7 products (Upfront, IWR, CQ, PowerPlay etc). ReportNet was built later, and uses a different architecture. Probably the closest you can get without lots of work is to add your alerts into Upfront, then include your Upfront content in Cognos Connection, but of course this doesn't give you integration between NoticeCast and your ReportNet reports. Out of the box I don't believe NoticeCast and ReportNet will work together directly, but if you have the time and skills, you could look into writing your own interface between the two using the ReportNet SDK and Series 7 CWS.
Probably not what you wanted to hear...
MF.