Initial thought was to bring out the "us" contained in the word "cluster", and aiding the domain relevance by including a full-stop. also was thinking Green is a friendlier, less corporate color. And of course, the cloud as background.
This is was just for fun! applying a landscape behind which could change depending on the time of the day - ie, more Google like (in terms of a fluid expression of the logo. The US is slightly darkened for better contrast/visibility.