Resolved with Q3 2014 expected till the end of October.
This feature will be available with Q2 2015 expected till the end of June.
Touch does not work correctly when RadTileList is unloaded and loaded again. The same behaviour can be observed in case TileList is placed in TabControl. Resolved with 2014.1.414.
Make Tile.DisplayIndex property a dependency property so it can be can be set through data binding.
Please provide an event for when a Tile gets moved and/or when a Tile gets placed into a group or removed from a group. Something simple like OnTileMoved with event args pointing to the tile and new values (like updated group) would be peachy. :)
If there is only one tile in a group and its Visibility property is set to Collapsed, the group header does not disappear.