Yes I'm sad to say that I've spent too long without messing about in Lisp. Now that I'm trying with pico lisp theres a lot of basic logic which seems to be bogging me down, such as when to quote and unquote things (though Pico lisp seems to be a little different in this regard).
Another omission, from the point of view of convenience, is the lack of a well developed string formatting function. Granted the built in symbol manipulation primitives are more general then a format function but in simple cases they lead to more verbose code. Note Pico Lisp does have a function called format but it is restricted to formating a single number as a fixed precision decimal.
Still I'm working slowly in adapting some examples from a Common Lisp book into Pico Lisp, and if nothing else its an enjoyable exercise.
It looks like I am on the Pico lisp mailing list, though I never got notified that my subscription request was accepted. Still I got to ask my question now, which is good.