You can find a wealth of information about the Arado Ar 240 (including photos) in the book "Messerschmitt Bf110/Me210/Me410" by Heinz Mankau and Peter Petrick, it being a rival design to the Mtt aircraft.
Evan, the Dressel and Griehl book didn't have much - just two pages and a little bit of info. There's one pic that shows the V6 prototype - T9+GL - that's pretty good.
Maximowitz, can you post some of the pics from the Mankau and Petrick book? Particularly on the camo schemes. thanks.
Yep, some subjects a little sparse on the info unfortunately (He 70 for example), but some great photos in there that I haven't seen elsewhere. (Found it in a library in Oz...just about photocopied the whole book!)