http://skype.com/products/skypeout/rates/all_rates.html
For calling. There is also a linux client =).
I think that the cheapest thing to do is probably find out how they do things over there with networking (I don't think is much if anything different) and just buy a linksys/netgear or compatible cable/dsl router. Just buy online and ship to her just that simple, you might need to purchase another cable with that cable/dsl router.
Jonathan