in case you missed it, Bryce 5 is offered free through Sept. 6 at http://www.daz3d.com

I have some tutorials here:

http://www.thebest3d.com/pdp/tutorials

Some are with Bryce 5.

Bryce 5 has a pretty impressive export module to send the terrain to other applications in various formats, with or without colors, textures, bump etc...

And the terrain editor is very powerful and intuitive too.