I just looked this up now since I also took the test today. According to http://www.ets.org/gre/subject/scores/get
, we can get scores by phone on November 14th and they should be online/received by mail by November 25th.
If your hope is to apply a year before you graduate and then defer entering graduate school by a year after being accepted (so you have time to graduate from undergrad), what I have heard is that very few schools will accommodate this - they would have to hold your funding for a year to do that, and most would rather fund another grad student who can come this year instead. If you mean leaving undergrad a year early, then I know nothing about that (but most schools say that you must have a Bachelor's degree to even apply from what I've seen).