If you haven’t seen it already check out the PowerShell Deep Dive at this years “The Experts Conference”. http://www.theexpertsconference.com/us/2011/general-information/2011-powershell-deep-dive/
As well as total immersion in PowerShell you can dabble in some of the minor technologies associated with it – AD, Exchange, SharePoint, Virtualisation and the cloud.
I’ll be there with a bunch of other PowerShell MVPs. Hope to see you there.