Google has open sourced GWT (see Ed burnette). That's great.
Despite this fact:
Google is the "Closed Source Company".
The most important platform on the web (1.0 or 2.0) is Google Search.
All the web-based companies depend on it. It's as important for them as the NYSE for a public company.
But imagine NYSE would delist a company without giving any statment.
Google can do this (and has done it), as it's search algorithms are completely closed.