Unless someone has some information I don't have, RetroGames simply stopped answering emails circa late 2001-early 2002. I remember this was the buzz on the Turbo List during those days; I can't remember if anyone ever actually figured out "what" happened to him/them.
I find it curious that DragonmasterDan stated in 2005 that RetroGames was "still doing repairs." I'd be shocked to find out this was the case.