I too have used all the Blitz products..
I started a game in Blitz2d (which still works BTW on win7 x86 .. both the language and the game written witrh it)
I've just ported it over to GLBasic and i'm continuing to develope it in GLBasic
(it took me less than a day to convert it)
its still a work in progress and has been posted in the beta area here
OH and BTW for those who are interested .. the size of the compiled EXE from GWBasic is smaller than it was compiled in Blitz2d
the link to the demo of the program i'm working on is here
http://www.glbasic.com/forum/index.php?topic=4800.msg36482#msg36482