Linux Magazine Compares Bash and PowerShell
by Todd Ogasawara
Linux Magazine's Marcus Nasarek took the issue literally and wrote a 2-page PDF document comparing and constrasting Bash and PowerShell. The download is linked at...
SHELL GAMES : Comparing Bash with the Windows Vista shell
For me, PowerShell has had a odd learning curve. It sort of looks like the old DOS CMD shell when you first bring it up. But, that is all there is: A superficial resemblance. This might throw off Windows/DOS users. It also has kind of a Bash/Perl feel to it at first. But, the differences show up pretty fast as you explore PowerShell. Nasarek's article does a good job of comparing and contrasting Bash and PowerShell in the 2 page PDF. Any *nix shell user who may need to work with PowerShell on Windows Servers will find this article interesting.
Microsoft Port 25 PowerShell blog posts
Okay, I just read the PDF. Interesting.