I completely agree with s.frings.
Almost a year ago Brian Bagnall (which you all know from his books, and from all the work that he has done for leJos) told me that the 1.0 version would have been released and that he would publish his new book.
quote from his e-mail:
The book is pushed back slightly to sometime in August. It will contain code for the latest edition of leJOS NXT. When I submitted the book in 2011 it seemed possible we would have 1.0 released by now, but that's not the case so the description will be updated to reflect that soon.
Unfortunately Brian bagnall never published his new book, and the 1.0 version still isn't here.
I think leJos is really a great project and that it is stable enough to release the 1.0 version.
I hope one of you , the leJos developers, will reply to this post.
Here is the amazon link of his new book:http://www.amazon.com/Maximum-LEGO-NXT-Building-Robots/dp/0986832227/ref=sr_1_2?ie=UTF8&qid=1369508921&sr=8-2&keywords=maximum+lego+nxt