To make this Drupalcon yet another developers paradise, I was starting off by looking at the existing session proposals and initiating contact with many session submitters. In some cases, I believe site building sessions crept into the track, so we are working to straighten out some session descriptions and placements. It is generally a good idea to include a good description of yourself with your prior experience explained as well as write up a decent session description so we can get a feel for what are you planning to cover in how much detail.
Trends with the presently submitted sessions seem to be mobile development/deployment, video management, the command line, best practices for coding, extending up and coming major contributed modules (Group, Ubercart on Drupal 7, Views 3) and learning from worst practices even.
It is not at all late to grow this list with exciting sessions. There are certainly some topics missing here getting people ready for some crucial new things in Drupal 7, like the new database layer or fields in core; an update of where the drupal.org git migration is standing, and so on. I'm trying to do my best to contact expert speakers in these areas, but would be extremely open to suggestions on what are you missing from the suggested list of sessions for the track. Let me know in the comments (or via my contact form), so I can do my best to get the content you'd like to see. It's one thing that you'll be able to vote on session proposals but your requested topics are also highly valued.