I will get in in the next few hours (it's out for delivery now) and they're going out to everyone today.  I'll send everyone their tracking number.

Yes. Inefficient. As in less efficient than something else.
The crucial point is that generally it costs more in electricity than you will make in bitcoins.

But here it is not you paying for the electricity. It is Amazon! They let you have a tiny computer in the cloud on them!

You are going to make absolutely minute amounts of bitcoins from it. Probably not worth the effort of setting it up even after its been running a year!
The question was asked, I answered it.
*Edit* I worked it out. Its so slow that you'd be lucky to get a couple of pool shares a day. Really not worth the effort*

Really the only time when CPU mining can be of any use is when you have a lot of machines.
Usually that means botnet, but there are also the fair share of school admins etc that leave the school network mining away over night.

Not technically illegal unless their contracts prohibit using the machines for self gain, but I doubt you would keep your job if the boss found out!

It would have been nice if the Welcome registration email told people that.  But then the trolls would know.. and easily do what trolls do, and so new users like us have to be really interested to not give up on this site.

mine got shipped yesterday.