Google and Open Source
It is a wise and well thought out choice that Google went with the Apache license instead of the GNU Public Virus. Despite what you might have heard from the Stallman lackeys, the GPL is in fact one of the most restrictive software licenses there is, on par with commercial licenses. There are far less restrictive open source licenses like Apache, MIT, Berkeley and others that permit and encourage active community participation and development without crippling the ability for commercial entities to release proprietary products that use the open source product.
I also wish to refute your statement that Google is not very involved with open source projects. (Apologies for the paraphrasing, El Reg's comment system doesn't provide context for me by default.)
Google have contributed extensively to the open source development community for many years. http://code.google.com/opensource/ is their own central "open source news" site, which probably doesn't even discuss the company's direct contributions (by way of code) to Linux, Firefox, MySQL and many many other open source projects.
Google is a commercial entity with the intent of making a profit. The fact that they continue to do so while actually providing so much useful product is respectable.