I was able to get my wife to love OS X as well, she just uses a laptop all the time (mainly uses the computer while sitting on the couch) so portability is the biggest issue of non-use for the Mini. When she gets the chance she's all over my MBP, but I'm gone so much that she doesn't get that opportunity very often.
It's looking to be around mid-February when we will get her MacBook, but I'll probably buy her a refurbished one, unless there are drastic changes. I bought my MBP refurbished back in February and haven't had any issues with it, and it's been used every day since then.