The JavaOne 2011 Schedule Builder is now online as described in JavaOne 2011 Schedule Builder is LIVE!.
One of the things I like about this year's JavaOne Schedule Builder is the color coding. With JavaOne events in blue and Oracle OpenWorld events in red, it is easy to quickly identify which conference each keynote and session is associated with. The colors are present on "My Schedule" where time slots during the week are blocked off and the same color differentiation is available to distinguish the sessions available at a given time.
I was happy that I had reserved a spot at some of the most popular JavaOne 2010 sessions last year and so plan to take full advantage of Schedule Builder again this year.