2.0 will be built on php 5.3 so there is a good chance that the developers will use namespaces (but, you can use namespaces in 1.1 for yourself, as far as I know)
Check the sections we have in this forum… any question or answer related to the section description is a good post… like any question about a Yii problem… or an answer that tries to solve/help another user problem…
I wrote the line above because there was a user that made 20 posts and in each writing just a number from 1-20…
As for the "hidden" yii 2.0 section… there is really not much information… that section is more about users expressing their idea on what should be added/changed for the next Yii version
The yii 2.0 version is still in early alpha stage and it has still a long way to go… the code is not available yet for public view (it’s on a private repository for now) as there are not much to see there, just some fundamental classes… when it will be ready it will be posted on github…