I once e-mailed one of the developers of Minimo asking about a Qtopia port. He replied that what's needed is a Qt implementation of Gecko and he added that it's a regular feature request but they don't have the people to code it.
Then there was the big KDE conference in Germany (Akademy) which included a coding marathon and I vaguely remember reading that Qt Mozilla was one of the projects being worked on there. I guess someone stuck with it and these are the results, which is great. As good as konqueror-embedded is, I'd love to have Gecko on my Z.
z.