At the moment, two 🙂
I bought one on launch day, and my sister happened to be visiting and ended up loving it, so I went back out to the Apple store with her, and she bought one for herself 🙂
We each have a 16 gig wifi model. I'm hoping that my mom will eventually get one as well - this is the best experience for her, as she just web surfs, checks email, and types up the occasional document. (With the new print app, we can print to any printer in the house as well.)