The Png Project browser extensions let you .png instead.
Take a look.

ImageOptim will optimize your images — so they take up less disk space and load faster — by finding best compression parameters and by removing unnecessary comments and color profiles. It handles PNG, JPEG and GIF animations.

A stock of some pixel arrows for your websites !

This will work very well with Dropbox and other Finder locations. Thanks for sharing!

iPhone Wallpapers

DeskSync allows the user to sync the user and login desktop. Just double click the application, and the current background is synced to the login screen, OR drag and drop any image onto the application and the image will become both the user and login background. That simple!

Vladstudio is the project of Russian digital artist Vlad Gerasimov. In 1998 I started to design user interfaces for web sites and software applications. However, when I had some free time, I created desktop wallpapers. Over the time, this hobby has grown into business, and today I enjoy full-time self-employment, creating wallpapers for your computers and mobile devices. I love what I do, and I am happy that many people around the world love it, too!

The wood-like wallpaper pack. Hope u'll like it.