In the MVC sample package (part of thge preview) on the start page there are several LinkItemCollections rendered in the bottom of the page. They are renderered through PropertyFor where the LinkItemCollection is passed in as argument.

Then there is a partial view for LinkItemCollection looking as:

<ul>
<% foreach(var linkItem in Model ?? Enumerable.Empty<EPiServer.SpecializedProperties.LinkItem>()) %>
<% { %>
<li>
<%: Html.PageLink(linkItem)%>
</li>
<% } %>
</ul>

So each linkitem is rendered through a helper method PageLink that takes an LinkItem. If you reflect that helper method you can see it uses IPermanentLinkMapper to get the corresponding ContentReference from the Guid. Then it calls PageLink overload that takes a ContentReference as parameter.

Thanks Johan.  It is exactly what i needed.