One of my applications on the marketplace is the countdown tile application. This is a simple application that when pinned to the home screen lets you see a countdown of the number of days until a certain date.
This application has recorded 6299 unique users to date. It’s had a mixed bag as far as reviews is concerned but this is mainly down to the fact that the tile update isn’t the most reliable mechanism on the phone system (something for another blog post to come soon).
One feature that people ask for is the ability to use their own pictures in the background of the tile. This is something that I have been aiming to do for a ‘Pro’ version of the application to try and convert some of the 6K users into 75p purchasers 🙂
With this and the fact that some of the new updates to the live tile services within the Mango platform update that is coming has prompted me to create a control that lets user be a little more creative with the tile that they would like to create.
I am in the early stages of putting together a Tile Maker control that presents the user with an area the size of a standard live tile. Behind this area can be placed an image that the user wants to use within the tile. This image can be moved around by using multi-touch gestures. Once the user has the image in the desired place they can then take a snapshot of the tile area to use as the live tile.
If this control interests you you can download the current Alpha code from codeplex at this link:
http://wptilemaker.codeplex.com/
Let me know what you think and if you will find this control useful. Also if you can think of any additional features then pop them in a comment on this post.
Mike Hole 
Cool! A couple of days ago I was thinking doing the exact same thing! I will take a look at the codeplex project and maybe could event contribute if there is the need.
Man… you must have been looking over my shoulder. Was working on this for a friend and stopped right before I started the clipping code. Your solution is quite elegant!