The good news: everyone involved is alive and well - no personal problems, illnesses, brig time, etc.
The bad news: everyone involved has new commitments that preclude active blog authorship.
Backstory: the original founder of the blog is an active US Navy officer. A little over a year ago he was deployed at sea, which made it difficult for him to regularly contribute.
His stand-in, a retired UK Royal Marines Commando, performed admirably in his stead.
Current Events: the original founder has completed his sea tour. However, his new assignment is one requiring a substantial commitment of time. Furthermore, it comes with a degree of sensitivity and confidentiality that makes it impractical for him to resume his blogging activities.
His replacement has likewise undertaken an additional workload that reduces his free time and makes continued blogging unfeasible.
Bottom Line: The Mellow Jihadi has passed on to that great blogroll in the sky. There is a slight possibility that a future version of it may come to pass sometime around Spring 2016, but that is uncertain.
If I hear anything else I'll pass it along.