Enumerate List Item Permissions

We have a SharePoint list that has item level security.  (It is a custom link list - not a library)  I need to list out the permissions for each item.  I've been trying to use powershell to do this but have not gotten very far yet.

I have this so far:

$site = new-object Microsoft.SharePoint.SPSite("http://mysite") 
$web = $site.OpenWeb("mysubsite") 
$list = $web.Lists["mylist"] 
$items = $list.Items    #Get list item collection
$ItemsCount = $items.Count    #Get list items total count
for($Counter = $ItemsCount-1; $Counter -ge 0; $Counter--)
{
    $Item = $Items[$Counter]    #Get list item via index
   Write-Host $Item["Category"] ", " $Item["Title"] ", " $Item["Ref#"]   
}
$web.dispose()
$Site.dispose()

I tried using a foreach instead of the for loop but did not have any luck getting any results - like so

     foreach ($item in $list) { write-host code here }

Anyway, now I need to enumerate the permissions but I'm at a loss for how to go about it.  Also, I want to save this to a csv file - which I think I can figure out from other examples I've seen.

I'm really struggling with finding some good documentation sources for Powershell.  I can't find much of anything that documents the methods (or are these properties?).  For example above I have $site.OpenWeb, $web.Lists, $list.Items; what other methods are there that I can apply against site, web, list, or list item?

Nancy Forbes