If you’re familiar with TNTmips, I recommend pointing your browser to TNTtalk, a new forum that’s started at Google Groups. According to the TNTtalk moderator:
The group is the meeting point for users of MicroImages’ TNT products: TNTmips, TNTedit, TNTview, TNTserver, TNTsdk, TNTlite, and TNTsim3D. The aim of the group is sharing ideas and methods on accomplishing geospatial tasks. Ask questions, provide information on your projects, and demonstrate your skills.