As a further fbink
Just an idea: would it be possible to implement something like
-C TRANSPARENT.
I think that in conjunction with a
-B BLACK text background it would be fun to view a background image *through* the text.
And in addition, for consistency, maybe replace
-O, --bgless with
-B TRANSPARENT
[EDIT] "TRANSPARENT" or "NONE" or "WATER"
Code to produce the above screen shot: