I think that you will be better served going straight into 3.0. Unless you have a legacy codebase to contend with, there are very few advantages to learning the 2.xx ways of doing things.
In the Python world (as in most others, really), releases do tend to take a while to migrate down to all of the subprojects, but if you ever find the need to transition back to 2.xx, I don't think you'll find relearning things to be particularly painful.
