I had to branch Proj.4 for c++ as well :
http://github.com/h4ck3rm1k3/ProjC--

Now the transform is working, it looks like some strange problem with calling c in c++!
the Dime repo has the dfx2vrml
http://github.com/h4ck3rm1k3/TwoNickels

Checked in:
Sun Jan 3 16:06:32 2010
[master 8798c5a] Now working!
1 files changed, 304 insertions(+), 11 deletions(-)