I'm a totally blind programmer who uses Windows as my PC operating system and an iPhone for my smart phone. For basic email and internet browsing I'd have her try an iPhone or iPad mini. I've found an iPhone much easier to use then an iPad do to spacial layout being different on a larger screen. I started out with an iPhone though so if she starts with an iPad this may not be an issue. I'd stay away from an iPod touch if possible unless updated hardware comes out. I've found the iPhone 4s to be a bit sluggish but usable with voiceover. Since the iPod touch has 4s hardware I assume you would run into the same issues. If you know someone with an old iPhone or iPod touch though she could always try it and if she gets comfortable upgrade to newer hardware.