Ramping up? Here is what I have found - please share what you have found.
To start you off there is a TechNet library node for PowerShell core at: http://technet.microsoft.com/en-us/library/bb978525.aspx"...contains the Help content for conceptual topics, cmdlets, and providers. This content is published here on TechNet so that we can provide updates to the Help content that is shipped with Microsoft® Windows® PowerShell."
Professional Windows PowerShell Programming: Snapins, Cmdlets, Hosts and Providers
Creating cmdlet Help blog post
TechNet Script Center PowerShell Tip of the Week
Script Center Script Repository: Sample Windows PowerShell Scripts
Windows PowerShell™ v2.0: TFM 3rd Edition - Pre-Release Sample Chapter
Windows PowerShell Cookbook: for Windows, Exchange 2007, and MOM V3
Windows PowerShell in Action
Pro Windows PowerShell (Pro)
Codeplex PowerShell Community Extensions
jaredpar's blog posts
PowerShell Team Blog
TechNet PowerShell Tag Cloud
Bink.nu PowerShell Tag Cloud