This little PowerShell script you can check how familiar you are with all the built-in aliases in PowerShell V2 CTP2.
For each alias there are 7 cmdlet names to choose from. There are 10 questions, and at the end of the quiz you can review your results and optionally run the quiz again.
You need to have PowerShell V2 CTP2 installed for the script to run.
Good luck :)