Apparently Grant still works for Microgaming but does so for fun, as one of the conditions of the sale was a profit share in all future earnings. His brother Dean retired and is travelling the world.
So, sounds like Grant did OK :)
I may have never dedicated my life to open source without denthor/asphixia.
It was the proof of code creativity and that great things could be done by sharing. This was a new way of creating art. A new way of defining cultural exchanges around art, with an open mind.
Infinite thanks.
Denthor's tutorials were also included in the "PC Game Programmer's Encyclopedia" (also on that site) which collected many useful documents. I had been programming for a while, but Denthor's tutorials were among the first that allowed me to go beyond simple text adventures and graphics with the BGI (Borland Graphics Interface!).
All that stuff had a profound effect on me; not just the technical information, but the idea of communicating that information for free in a way that was comprehensible to novices.
With that and Ralf Brown's Interrupt List, you were Superman.
If anyone's curious you can actually find Denthor's tutorials here: http://textfiles.com/programming/astrainer.txt
I also searched around a bit and found this good thread that seems to indicate Denthor is doing well these days and lives in England with a family: http://www.pouet.net/topic.php?which=7530&page=1