Nibbida wrote:Are there many different kinds of enlightenment,
It seems that the term 'enlightenment' is used by different Buddhist schools to denote different things. For example, in the Theravada enlightenment consists in a progressive development of understanding, bringing about a gradual purgation of the mind from its fetters in four stages (stream-entry, once-returning etc.). Now if you go over to Zen Forum International and ask the posters there what Zen has to say about this, I expect Reverends Nonin and Jundo, and others, will tell you that practice in their school has no truck with any such notion of 'stages'.
or are non-Theravadin's not enlightened?
To judge from the Mahaparinibbana Sutta it would depend on whether non-Theravadins understand and cultivate the Eightfold Path.
"In whatever Dhamma and discipline the Noble Eightfold Path is not found, no ascetic is found of the first, the second, the third or the fourth grade. But such ascetics can be found, of the first, second, third and fourth grade in a Dhamma and discipline where the Noble Eightfold Path is found."
Are Zen masters enlightened in the Theravadin sense? Are Tibetan lamas?
I don't know about Zen masters. The spiritual virtuosos of Tibetan Buddhism are believed by their devotees to be enlightened in a vastly superior sense to that of the Theravada.