San Francisco-based Salesforce.com has acquired Thinkfuse, a developer of software used for managing group communications, status reports, and project updates. Financial details of the buy were not announced. Thinkfuse was backed by SV Angel, Andy Sack, Ali Partovi, Hadi Partovi, and Scott Banister. As part of the acquisition, Salesforce.com is shutting down Thinkfuse on July 25th.