As a keyboard teacher I can say with honesty that there isn't a substitute to going out and getting teacher!
Certainly I wouldn't learn by computer software - if you really want to learn remotely, your best bet is to pop down to a local music shop and buy a couple of pre- grade one tuition manuals, sit down at your keyboard and invest an hour a day of practice.
Software and these books are of limited value however because everybody develops their own problems and strengths throughout the process, and you really need a teacher to monitor your progress if you're talking about learning properly. Things like controlling hand position, posture, rhythm, sight reading and theory are best understood when there is someone there to help you out! PM me if you want to chat about it.
ive been trying to teach myself for 6 years now with books and software. i took one lesson from a friend who doesnt even play piano as his #1 instrument, and 3 years of progress was squeezed out of two lessons.