According to the SpaceX website, the company successfully completed its static test firing on Thursday with no engine anomalies found. They did, however, detect an anomaly from the GPS portion of the guidance system fifteen minutes after the static firing. The GPS is not a critical system, however, as it is only a backup to the inertial guidance system.
At this time, the company still expects to launch in the coming week, so keep your eyes open. They will be webcasting the launch when it happens.
They also have two videos of the static firing, one at medium distance and one up close.