I'm using L3DT's ability to create a tiled set of heightmaps and texture maps to create continent-scale scenes in TG2. Blogged about it in case it helps anyone else:
http://terragen2.wordpress.com/2011/04/17/continent-scale-heightmaps/
I just bookmarked your blog. Interesting stuff. 8)
Glad you find it useful :-) The learning curve for TG2 has been a bit steep for me, so I try to document what I learn to benefit others.
Updated the code to fix a bug I discussed in this post:
http://terragen2.wordpress.com/2011/04/22/the-world-is-flat/
Cool app. I may use it at some point in the future ;)
monks