Re: Who can help me get 3d acceleration working?
Yes, 3D acceleration is supported on nVidia cards with the nVidia FreeBSD drivers. What you quoted even says "These drivers provide optimized hardware acceleration for OpenGL and X applications ".
110 FPS under PPracer sure sounds accelerated to me. If it was reverting to software rendering, you'd probably be getting in the range of 0-5 fps.
Did you try the FreeBSD agp support like I suggested?