The environment I work in now is hevily Window-ified.  This is due to the extensive use of PowerShell for the Build/Release processes and the fact the major project is a SharePoint installation.  Now that we have moved to Subversion and have packages coming out, sometimes with only small fixes, I decided I needed a way to be able to get some information on a package.  To be able to include this in the Build scripts I needed something in PowerShell that would query Subversion and give me a list of comments from all commits since the last release version.  This worked out well, took a bit to figure out, but it came out nice in the end.

function GetLog([string]$target, [int]$base_version, [int]$target_version, $relNotesDir="C:\Temp")
{
 if(($relNotesDir -eq $null) -or ($relNotesDir -eq "")) {
  "The " + $relNotesDir + " is empty. `n"
  $relNotesDir="C:\Temp"
 }
 if (!(Test-Path -Path $target)) {
  $target + " does not exist.`n"
  "Try the $target path again, make sure it is typed correctly and exists.`n"
  exit
 }
 if (!(Test-Path -Path $relNotesDir)) {
  "The Release Notes directory " + $relNotesDir + " does not exist.`n"
  "Enter an existing directory and try again.`n"
  exit
 }
 
 "Looking for changes from " + $base_version + " to " + $target_version + " in " + $target
 "Writing Release Notes out to " + $relNotesDir
 $releaseNotes = Join-Path -Path $relNotesDir  -ChildPath( "releaseNotes_" + $target_version + ".txt")
 $Command = "svn.exe"
 $Range = "" + $base_version + ":" + $target_version
 $Params = "log",$target,"-r",$Range,"--xml"
 $svnlog = [xml](& $Command $Params)
 $svnlog.log.logentry | foreach {
  if ( $_.revision -gt $base_version ){
   $a = ( $_.revision + " : " + $_.author + " `n " + $_.msg )
   $a >> $releaseNotes
  }
 }
}

Hope this helps someone out!