I suppose I'll start by breaking the bad news. My plant died. I think it may have died almost immediately after I bought it, and it just took me awhile to notice since it dried in a very life-like pose. In my defense, there really isn't any direct sunlight in my room. My window does look out on to a tiny air shaft.
RIP Spiky Plant. I never could remember the name the guy at the flower shop told me was yours.