OK. Thanks to all for the comments and the favs, it's nice read that things (:
Now, I update the version to the 2014 version wich includes 31 popular websites/cms and browser's icons in PNG format.
The icons that are included in this set are: Blip.fm, Blogger, Del icio us, Digg, Facebook, Firefox, Flickr, Foursquare (new), Gmail, Google, Hi5, Instagram (new), Lastfm, Linkedin, LiveJournal, Meneame, Myspace, Netvibes, Picasa, Pinterest (new), Reddit, RSS, Skype, StumbleUpon, Technorati, Tumblr (new), Twitter new version (new), Twitter old version, Vimeo, Wordpress and Youtube.
The icons are available in the size: 24x24, 32x32, 48x48 and 64x64
The use of this set is totally free with Creative Commons licence.
I think do a third part and if you have an idea of more sites for this style I can add it to the list.