don't know if either of these are what you mean, but thay both started from mountain bikes
something i started fooling with. didn't end up as low as i thought (not too high though. seat height is about equal to a girls beach cruiser), but rideable anyway. i'm thinking sort of a softtail bobber type thing now
it really was out of the blue, but i'm keeping an eye out now for a 24" mountain bike with similar rear suspension to make myself a larger bike. this one is just a 20"/24".
and one i played with for a buildoff that started from a hybrid type mountain bike. i'm a little further along but this is the last buildoff pic. don't have a newer one
working on finishing the front end.
playing with a couple other ideas too, but for now i'm just staring at the parts without a real clear idea.