Ahh, company naming. In 1999 it was *ent and *ant. Now? To hell with it, just put an adjective and some kind of living thing one after the other. It's a sure-fire hit!
I mean, really. Greenplum? Is there something particularly plummy about this that precludes the possibility of other fruit taking the honor? And aren't plums supposed to be purple? I don't think I'd even -want- a green plum, to be honest. Apples, at least, come in both green and red - but I suppose that one's taken, isn't it?