I don't see in these quotes where Ajahn Sumedho, or the Suttas, say that this development of awareness, refuge, etc, is Nibbana. I think there is a serious confusion here between the path and the destination.
In fact, as I recall, Ajahn Sumedho has explicitly stated in a talk I listened to (perhaps on his 70th birthday) that he has not realised Nibbana.
Having some knowledge and confidence in the Dhamma, or even having some insights, is not Nibbana. There is a lot more work to be done.
In the absence of a teacher to point out how much one still has to learn (that's one of the most important roles of my teachers...), reading a little about the Progress of Insight might be helpful. http://aimwell.org/Books/Mahasi/Progress/progress.htmlhttp://www.buddhanet.net/imol/develop.htm