Unfortunately it's been some years without an update. Unfortunately the backend library this service uses is not updated as often as we would like. Because of this, and a number of other minor issues, we are currently working on a replacement site that is nicer, faster, and supports more languages. That being said though, this is a zero-income project for us, so it's not the highest of priorities.
In the mean time, I have grabbed some of the more recent syntax definitions and uploaded them, fixing a number of issues in langauges and also adding PowerShell. Note that this is hack-and-chop work, so please let us know if there's any problems.