Plancast is a social networking service many expected to become a fixture for those who like to give âfriendsâ opportunities to be where theyâll be and do what they do.
The service has already floundered and is now dying on the vine.
This link leads to a very good analysis of its failure by its CEO, Mark Hendrickson. His timely comments perfectly reflect why I (a very early adopter) couldnât use the service on a regular basis. As far as Iâm aware of this analysis is a first for the social sector.
Also interesting are the comments of people who (as I did) liked/loved the service and honestly tried to use it as much as possible but for various reasons couldnât. Scoble himself appears to have been  the first to comment.
The article: The Uphill Battle Of Social Event Sharing: A Post-Mortem for Plancast
Why am I sharing this? If nothing else, it provides tangible evidence that âgreatâ ideas must have a viable model and a willing market that will achieve the critical mass necessary for success. Just my 2¢.