can we see the past champions from prior seasons?
Sure. You can see them on your standings page by scrolling back years (the medal will be next to the name and it says league champ). It will also show on your public profile page.
Here is an example of a league from 2011:
We keep very comprehensive history.
okay thanks, i have another question. when i set the time for my live draft, is it a eastern time or will it be hawaii time when i set it?
It syncs up to whatever your timezone is on your computer. When you set it, it will actually show the time zone on the Edit Live Draft page.