How can I make my own Iphone and laptop wallpaper for others to download?

How is this done?





How can I make a wallpaper for my mobile, iphone., blackberry or iphone and then how can I make it available for other people to download?





How can I make it compatable with all mobiles etc?|||Try zedge|||Create versions in several different resolutions and upload them somewhere so that others can download.





If you need image hosting, here are a few places that you can use for free:





http://tinypic.com


http://bayimg.com


http://xs.to


http://pics.yupoo.com


http://flickr.com


http://mynetimages.com


http://1t1t.com/


http://imagechicken.com


http://ipicture.ru