With current CVS, the slime inspector shows the entire contents of large arrays when they are in slots of a class instance being inspected.
for example: CL-USER> (defclass a () ((b :initform (make-array 10000 :initial-contents (loop for i below 10000 collect i))))) (make-instance 'a) #<A {23F76299}>
when inspecting the object, all of the array is displayed, but when you look at just the slot, it is limited to a more reasonable 120 or so entries.
-b-