I love Topofusion, and with a fair amount of research, I've been unable to find another program that has all the features that one could wish for, is constantly being improved, and is a great value. Only Topofusion fits this bill.
There are a growing number of Mac Users, and many of us are willing to use Parallels to use great PC software. (actually, the only reason I use parallels is for TopoFusion - the rest of my applications have a suitable Mac equivalent). The problem is that - even with Parallels 4.0, we cannot run Topofusion Pro very well. Topofusion Basic works superbly, but all of the new development is focused on the Pro version. I purchased more RAM, allocated 2GB (of 4GB) to the PC, and topofusion ~works~ but it frequently crashes (upon startup, or while zooming in and out of maps). I know this is probably a tall order - but it would be really really neat to be able to use Topofusion Pro on the Mac. Thank you for considering my request; meanwhile, I will continue to be pretty happy using and spreading the word about TopoFusion basic (and Pro to my PC friends).