yup - i've used it, made some awesome games in it, mastered it, and moved on. Thats how i learned how to program. It was basically a programming language with built in lessons - a really great idea released by Interplay around 1996ish. In fact there still is a live LTPB community forum up and running.
here are some games i've made with it in the past...




the language is actually a pretty good one - except for one major flaw... they had a absolutely crummy color palette which caused alot of potensially good looking games to look bad.
there is currently a project going on to rebuild the LTPB language fixing problems such as these and release it once more. And since LTPB is pretty much deadware - and interplay is no longer in business - this is not against any copy right laws. Sineful.com is the company in charge of it.
the current LTPB cummunity resides here:
http://www.secantengineering.com/forums/
we just recently got a new forum so it seems pretty empty right now, but there are people there that can help you out.
occasionally we'll host 2-hour programming competitions and things of the sort, and currently there is a longer competition being hosted there. check it out if your interested
www.calypson.batcave.net (Under Construction)

Calypson - aka Indigo @ art forums