Do we "like" making crowns for implants??? Hmmm... Yeah, I guess so. There are a few extra steps in some of the process, and there are different options, depending on the type of implant the surgeon or dentist uses, but all and all, I'd say, they're just as much fun to make as a normal crown.
As for your sister, I'd strongly suggest an implant before a bridge. But be sure to let her know that not EVERYONE is a good candidate for an implant. The proper bone structure MUST be there. If it was one of my sisters, I'd have them get a CT done, and have that reviewed by the surgeon and or lab. With the CT, they can tell whether the bone is thick and strong enough, and where to place the implant. If it's a go, and she opts for it, then they can actually design a surgical stint for the implant, using the CT scan. I'll try to post a screen shot or two here, so you can see how much information the scan gives the surgeon.
BTW... Good luck on the PacMan score. :P