Don Callis is his name, he did some work with ECW after his WWE stint and then completed his MBA. He eventually worked with TNA for a while, and claims that he invented the "Ultimate X" match. He left TNA and went into the business community.
I agree he was very good and the WWE blew it with him.
The Jackyl was an awesome manager in WWE, so underrated. The way he would portray his David Koresh persona on guys like Kurrgan, Recon and Sniper seemed to go over the heads of many in the audience, but he should have been given the chance to work with bigger guys. Many times he was the catalyst for angles/groups like The Oddities, who he then abruptly parted with, with no explanation given. Then when he formed The Acolytes, he was shafted once again without even given a chance.
Many people were saying he was a contender for the Higher Power angle in 1999 because he was the guy who brought Faarooq and Bradshaw together as the Acolytes. Would've been awesome if it came to light but indeed he was working for ECW at the time. A shame he quit the business really.