This post is also a question for the hive mind: as sometimes happens, one of these followed me home from work, and now all of them, both the ones left at work and the one I bought, are dropping lots of leaves and looking kind of miserable. We've had these since either December or March; they behaved themselves just fine until the last few weeks. Googling the species brings up a lot of complicated-sounding care advice that, frankly, makes me a little angry I bought one, but I'm willing to work with mine if we can learn to communicate. I gather that I haven't been watering enough: does anybody have any other advice?
(UPDATE 26 Dec. 2008: It wasn't just watering. I did figure it out well enough to write a profile about Adenium obesum, but the plant in question was gone a long time ago.)