This weeks App Of The Week for Windows Phone 7 is MegaTile.
This app allows you to create custom tiles to pin to the Metro UI home screen of your Windows Phone. This tile can be customized to fill a number of different functions from linking to a specific web page to acting as a speed dial for a single contact. This app is made even better by the fact that you can use a picture from your photo album as the image on the tile. In addition, such images can spread over multiple tiles relating to a single topic.
This is a great app which is a must have for all WP7 users who yearn for that extra bit of customisation.
MegaTile, Windows Phone 7, £0.79