I think Google is whining because they didn't win, and they know communities like this are anti-patent and will automatically side with them if they portray it a certain way. It's hypocritical to complain about the patent system and that competitors won patents you also wanted and were bidding on.
4:2004-cv-04922 Google Inc. v. Skyline Software Systems Inc. 5:2005-md-01654 In re Compression Labs, Inc., Patent Litigation 5:2004-cv-03934 Google Inc. v. Compression Labs Inc et al 4:2008-cv-04144 Google Inc. v. Netlist, Inc. 3:2009-cv-00642 Google Inc. v. Traffic Information LLC 1:2011-cv-00175 Microsoft Corporation et al v. GeoTag Inc. 1:2011-cv-00637 Google Inc. v. Sourceprose, Inc. 4:2009-cv-01243 Google, Inc. v. EMSAT Advanced Geo-Location Technology, LLC et al
It is not without precedent at all.
Not that non-assertion of patents was necessarily a contributing factor to Sun's demise.
So they are hypocritical because of something they haven't done? By that logic, everyone is an hypocrite.
Has Google ever actually sued competitors aggressively? Not that I know of.
On the other hand, Apple and Microsoft are /already/ having an impact on Android and these patents would only strengthen them- their motivation was offensive and they were the ones who inflated the prices just to hurt Google.