Just recently, I have started to have some interest in defining, refining my views on the meaning of the 1000 years of Rev. 20 - I have shied away from this topic, as it seems to be controversial rather than edifying, but I am putting it back in my "hopper" for a bit.
I thought this graphic was very good:
I tend toward amillennialism, simply because of my view of Revelation to be virtually 100% symbolic - I believe much trouble has come to the church by many folks over-literalizing the symbolic portions. Anyway, the distinctions have come back into my field of view, so I will be looking at them some.
Here is a good starter site.
Here is the discussion thread I started on the Puritanboard
Here is an excellent summary of the doctrine and it's adherents.