Here is a collection of free transparent wallpapers for the Windows Phone 7 (WP7) lock screen. This gallery will be updated as new images become available.
Instructions: To set one as your wallpaper you must click on a thumbnail to view an image, save the image to your PC. Send your an email from your PC to your cellphone with the image attached. Once the email/attachment has been loaded, click to open the attachment. Touch and hold the screen until the menu pops up. Set as your wallpaper and your ready to go!
Note: Won’t see transparency apparently if you use a password on your lock screen. Only for regular slide to unlock. Also, Mango does not support transparent wallpapers so if you upgrade, you will lose this feature (least of your worries though…).
Wallpapers brought to you by http://www.pocnetwork.net
For non-transparent Windows Phone 7 wallpapers visit: http://www.animevortex.net/blog/thesaint/windows-phone-7-wallpaper-gallery
For desktop wallpaper visit: http://www.animevortex.net/gallery/index.php