The new SSPTS is performing well, so mission managers have activated the 14-day option for Endeavour's flight. Meanwhile, a couple of chipped heat-shield tiles have engineers weighing the risk vs. reward of a repair EVA on the Orbiter's belly. NASA reports:

Managers Add Three Days to Shuttle Mission

Mission managers decided Sunday to extend the STS-118 mission by three days. The decision came after the successful operation of the new Station-to-Shuttle Power Transfer System (SSPTS).

Endeavour is now scheduled to undock from the International Space Station on Aug. 20 and land Aug. 22. In addition to the extra time at the orbital outpost, managers added a fourth spacewalk that is scheduled to take place Aug. 17.

The SSPTS reroutes power from the space station to the shuttle during docked operations, allowing the orbiter to conserve materials needed to generate power and spend more time in space.

Status Report #9 here. EVA # 2 is tomorrow (Monday).