There are no hardware bugs. We do have the hardware done, and have a bunch of them on the shelf ready to ship.
What we are waiting for and still testing is software. The servos have software in them, so we can't ship them until we have software that we trust. We are getting very close to that point and expect to have an announcement in a few days of when we will be shipping.
Overall, the testing is going well, but did take a bit longer than estimated, as always seems to happen.