<p>I played with one of the early beta versions of PowerShell V1, but haven't used it since it went "gold". What is the best way to get started using PowerShell?</p>

<p>Which version of PowerShell should I be using (V1.0 vs 2.0 CTP's)? What are you using PowerShell for? Are there any tools that make using PowerShell easier (that is, development environments)?</p>

There are a number of PowerShell tools, for example,
PowerGUI
PowerShell Plus
(not free)
PowerShell in Action
is a well-regarded book.
And the Powershell team
has a blog
.