Imagine somebody who know a lot about Lotus Notes/Domino, has been a developer of classic Notes applications for years, knows LotusScript and formula language, and only minor amounts of JavaScript or Java.  If that person asked you for the most intro level, what-is-it-and-how-do-I-start resource, is there a page in Designer help, or a presentation from a previous conference, or a wiki or something to hand that person?

I have had this question asked of me, even asked the question myself at one point, and I wonder if people could agree on some place "to start".  It is fine to add places to go next, but most of all, where do they start?