Marcus Nasarek did a nice comparison of Bash vs PowerShell in Linux magazine HERE. It is only 2 pages but he covers the key elements and has been very fair to it. I appreciate the fact that he took the time to clearly understand PowerShell. In the past, a number of people in the Linux community have assumed they knew what we were doing and did comparisons based upon their assumptions. Those weren’t very interesting.
Jeffrey Snover [MSFT]
Windows Management Partner Architect
Visit the Windows PowerShell Team blog at: http://blogs.msdn.com/PowerShell
Visit the Windows PowerShell ScriptCenter at: http://www.microsoft.com/technet/scriptcenter/hubs/msh.mspx