WHS Power Pack 1 could be available end of April
There has recently been quite a bit if discussion about PP1 in WHS forums.
One of the team members from Microsoft’s WHS team posed the questions on which the community wanted first. PP1 or the Data Corruption fix. The corruption fix is scheduled for June. From my reading PP1 is complete, they were just holding off releasing it until the fix was ready. The new features of PP1 are not affected by the corruption issue. The majority of the community has voted to release PP1.
Here’s a link to an article that has a better summary/explanation.