iEnvision ($10, Open Door Networks) is a tough app to describe, but I’ll give it a shot. It’s basically a tool to help you organize and view related images from the internet with a slideshow interface. The main screen in iEnvision displays a list of groups, covering topics such as art, astronomy, comic strips (many many many comic strips), news, and even USA national parks.
You can also add your own groups—I was able to add a page of images from my personal blog, for instance, that then appeared in a My Groups section of the group list. If you’re into comics, there’s a huge collection included with iEnvision, and paging through the day’s comics using its interface is much nicer than browsing through multiple websites to accomplish the same task.
There are also settings for iEnvision, which you’ll find in your iPhone’s Settings panel, that control things such as the transition between images, the duration of each image, and other such control items.
If you love browsing images on the web, you’ll probably love iEnvision, too.