I'm interested to see how the distro's manage this. Ubuntu seems to always have the latest and greatest, but I can't see them upgrading to Py3k any time soon. There's just still too much that relies on 2.x.

GvR said that new stuff should be built on py3k, but I'm betting it will be quite some time before anyone develops anything of significance on it. At work, even though we're in the early stages of developing our product, we're still sticking with 2.5 for the foreseeable future.

I imagine the adoption rate for Py3k will be worse than PHP5.