Gene, those are some great looking, happy roots. I took your advice and stuck with the see-thru orange cups, and I'm happy with them...it's harder to tell if the soil is properly damp, but the roots are very clear.
I also have some stuff laying around that's green. The pictures are terrible (BlackBerry camera, as usual), but ...
The small cups are a mix of all kinds of stuff - Bisirri, 143-36, Sudliche, Sal (Gene), MBVS, Hardy Chicago, Conadria, Gino's Black, Schuyler unkown and one or two others that I'm probably forgetting (bins are full with more stuff).
Edit: Those cups.... I ended up having a lot of problems with roots sticking.