Just ran across a new feature of PowerShell 2.0 that is convenient.  Need the path to the various profile scripts on a system?  Try this:

PS> $profile.psextended | Format-List

AllUsersAllHosts       : C:\Windows\System32\WindowsPowerShell\v1.0\profile.ps1
AllUsersCurrentHost    : C:\Windows\System32\WindowsPowerShell\v1.0\Microsoft.PowerShell_profile.ps1
CurrentUserAllHosts    : C:\Users\Keith\Documents\WindowsPowerShell\profile.ps1
CurrentUserCurrentHost : C:\Users\Keith\Documents\WindowsPowerShell\Microsoft.PowerShell_profile.ps1

To access individually you can use $profile.AllUsersAllHosts.

psmdtag:variable Profile