LOL, think Jurassic park!
I've never had them myself, but I've heard good stories and bad. Unless you are going to eat or breed, there's not much more you can do with them. If raised from a baby and socialized, they can be friendly, however, I've heard males are usually friendlier.
They eat ALOT of food, and need a very sturdy enclosure. They also need a run in shed sort of shelter. I've heard they should be fed a special emu feed, but the feed store around here does not sell anything special. I think my one friend who had them just fed them layer pellets, but she went through quite a bit each week!
They can be VERY dangerous, so even around tame emus you have to be careful. They are quite capable of killing a man. If they get loose, they are pretty hard to catch, and it usually comes down to a huge group of neighbors chasing the big birds! (One got loose down the road from me and no one wanted to go near it!)
I thought about getting them, but it seemed like they would not be "real" pets. I wanted something I could pet and it just didn't seem like Emus would be like that. If you decide to get them, make sure to do lots of research first! like I said, I've known people to have them with wonderful experiences and people whoe have had terrible experiences.
Good luck!