I only ever use short-lambdas in map functions (common lisp), or long-lambdas (for the :callbacks) again in lispworks (a common-lisp implementation) CAPI (GUI from the company that made LispWorks).<p>Once you have good syntax established for using lamdba-s in any form - they would be used. First users would be as I've put above - callbacks of sort (GUI, IO, etc.)