Here's a handy application if you have the need to text or email groups from your Windows Phone. Group SMS allows you to create groups from your contacts to avoid having to send your messages out individually.
In a hurry and need some boiler plate messages or responses? Group SMS also allows you to create message templates to send pre-defined messages. The developer, Stefan Stumpfl, liked the Metro design of Windows Phone 7 and choose the panoramic hub design for Group SMS to make it easier to navigate around. Group SMS tried to adapt the Windows Phone concept of "get in, out and back to life".
It's our understanding from Stefan that future updates to Group SMS will support multiple languages (German, French, Italian, and Spanish) as well as synchronization with Google Groups and Windows Live Groups.
There is a free trial version available for Group SMS with the full version running $.99. You can download both here (opens Zune) at the Marketplace.