WinterBoard is a Free Cydia App for your Jailbroken iPhone 3G (iPhone 2.x). Its a summerboard (V1.1.4 app) replacement that allows you to manage your themes. It gives you the ability to completely change the home screen (springboard) wallpaper, icons, status bar, and all that summerboard did.
WinterBoard has loads of features and is much more stable the then Summerboard we saw for the old iPhone. WB allows you to change fonts, keyboard looks, battery indicator, phone dialer, lockscreen, wallpapers/background and even your carrier name!!
See all Winterboard Themes and Customizations covered by us
Update: Winterboard’s Latest version is said to be compatible with iPhone 3GS and we have tested it on the iPhone and iPod Touch firmware wersion 3.0 and 3.01 . Do try it out