I went to USA nursing school for undergraduate only, so sorry I don't have a lot of info on their graduate programs. I know a lot of it is online, obviously, you still have to do clinicals on site, but I think almost all of the classroom stuff is online, so it is very flexible. Several people I work with are in the NP program and they work full time and have families at home. Sorry, I don't know about admission process or requirments.
The undergrad program was good, very rigourous (also a LONG waiting list to get in). Their NCLEX pass rate is somewhere around 97-99% (which they are very proud of). They told us in school that it was in the top 50 nursing schools in the country, although I have never verified that. I work in a local hospital and I feel that the new grads that come from USA tend to be more preparded and knowledgable than those from other Nu schools in the area (always exceptions of course).
Good luck! Hope some of that was helpful.