On the earlier post Recognize Microsoft Popfly (Session I) and Recognized Microsoft Popfly (Part II) : Create Blog to become more interesting with Popfly.
Unfortunately, on August 24, 2009 the Popfly service will be
discontinued and all sites, references, and resources will be taken
down. At that time, your access to your Popfly account, including any
games and mashups that you have created, will be discontinued.Also, in a
few days ago I've got an email the same as in the article on the blog
popfly.

At its core is the email alert to the user application Mash Up
Microsoft Popfly that will end the service. However, not fully
explained the reasons why Microsoft would like to finish this service.
Montgomery's eulogy points Popfly developers to newer Initiatives,
like Microsoft Web Platform, a set of tools to help developers build
web apps like "the next MySpace."
Uggggh, did they really have to put that in there?