It's not going to be another year before it's fully out, pre-alpha is less than a month away, then that is going to be open for a few months since they have updates every few weeks in which they release new skills/mini-games etc. So pre-alpha could easily run for 3-4 months. Then once that's over, give them a few weeks to get everything set-up and running smoothly, then they're release alpha and then you basically have a fully working rsps.
And yes, rs2006.net is safe, as far as we know since not that many people have played it.