Matt Cutts made a comment a couple of weeks ago in an Eric Enge interview that surprised a lot of people. He said links from Press Releases are ignored. But the recent changes to the Webmaster Guidelines make it look like Press Release links will soon be penalized. They are looking at them the same as an advertising link. The links will require a nofollow attribute.
Google's antics are already way past ridiculous--and I don't think anyone has seen any real improvement in search results.
Sooner or later people will start to wake up and boycott everything related to Google--maybe.
"Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote." -- Benjamin Franklin