Well, while I have nothing against SDL, here's my two cents: I've tried it and found out that it is harder to grasp for beginners in "actual" game programming (by "actual" I mean not in software like Game Maker/The Games Factory/Stencyl/CraftStudio, though I have nothing against them) than Allegro.pas (or even C allegro). That being said, I don't consider SDL inferior or anything like that, it's just that I had troubles with understanding SDL and have no troubles with understanding Allegro.

Also are you sure JEDI-SDL is not updated anymore? I've look here: http://sourceforge.net/projects/jedi-sdl/ and in Last update it says some date in May 2013. If Dominique is not doing it, maybe it's someone else?