That's the official roadmap. Dickon is working on the data tools, Itai on the class designer, Russell on workflow. Daniel (on and off, mostly off till end of May) will be working on WPF designer, C# 3.0 support, refactoring. David depending on time for the debugger. Problem is that for all our student contributors, spring is a bad time with regards to free time.
There are a couple things up for grabs: Sandcastle support, integrated PS, etc. However, preferred is to help on the above mentioned features, and to point one out: class designer. Itai did ask on his blog for help.
I hope that helps to explain why there are no dates in the roadmap. We will be publishing dates once we get closer to feature-complete.