Those dlls only demonstrate the latest changes in the control that will be available with the official SP1 release due later this week.
As for the TileView - if you want to use a custom control inside the RadTileView you'll have to create your custom TileView ( a custom control that derives from the RadTileView), override the IsItemItsOwnContainerOverride and GetContainerForItemOverride methods so that they use your custom TileViewItem and create templates for the new controls. If you don't need a custom control you can only edit the default template of the RadTileViewItem and add a close button to it. For further information could you please examine the attached project - WpfApplication1.zip.
As for the RadGridView, you may take a look at the corresponding articles for Consuming Data in our online documentation.
Let us know in case you need any further assistance.
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