Well, here’s an interesting article that includes some information about WeatherBug:
The Consortium of Anti-Spyware Technology Vendors (COAST) appears to be undergoing a messy self-destruction today. Two of COAST's founding members, Webroot Software and Aluria Software, withdrew as members of the consortium on Friday. Another founding member, Lavasoft, withdrew from COAST in December 2003. All three companies cited concerns about the direction in which COAST was heading as reasons for severing ties with the group.