Too bad cheering on a render can't make it go any faster. But that's the way it goes sometimes. Almost makes me wish I had at least two decent computers instead of one. So that way one could render and the other could be used for other productive stuff. (Not sure if web browsing or chat could be considered that productive, but at least I can do those two and leave 99% of the other cycles free for Carrara to render on.)
I think I'll have a really spiffy airplane pic once it's all done though. Hopefully the volumetric clouds assigned to a particle emitter in order to produce a believable smoke trail are worth the wait.