The Diagram library has been named "Motify".
When we were looking for a logo for Motify, we used the service LogoMyWay. This is a service where logos are designed through a design competition. The customer who wants a logo give a bid on how much they want to pay for a logo. The service has lots of registered designers that in turn sends in proposed logos to the client. The client in turn judges and ranks the entries. The designer that designs the top ranked entry will then get the initial bid.
The result of this competition can be seen here: http://www.logomyway.com/contestView.php?contestId=8224
We gave a bid of $300, in the lower part of their price scale, and ended up with 189 entries. An overwhelming amount of proposals in every form and color, which resulted in us spending a lot of time judging these entries against each other. In the end we selected the logo presented under.