From SlashDot:

As of today, UK Gmail users are seeing 'Google Mail' at the top of their Gmail accounts, and Google is warning they may lose their '@gmail.com' addresses in the future.

Google may be fighting on as many fronts as MicroSoft is!

Gmail recently became Google Mail in Germany as well:

Earlier this year, Google lost the right to use Gmail in Germany, following a dispute with the Hamburg-based finance firm. Giersch registered "Gmail – und die Post geht richtig ab." with the German Patent Office five years ago. Following a court injunction awarded by a German court in favour of Giersch earlier this year, Google’s German customers have been using addresses ending @googlemail.com.