Google launched a new logo today, finally giving up on the wordmark it has used with minor changes since 1999 when it was still merely a challenger among other search engines. It was designed in-house by Google's own design team, and they have posted an extensive case study (highly recommended).
The new logo still uses Google's signature colours, but the old serif typeface has been replaced by a simple geometric sans serif. The logotype is supported by two other elements, four dots that will be shown in transition phases and a multicoloured G that will be used as an icon. Previous icon symbols from Google have tried to retrofit the existing logo into a square shapes icons. This time, the icon and the logotype were clearly designed to work together.