Debacle Software's Pano app has been a photo favorite since the App Store opened in 2008. The Toronto-based development team announced that they've shipped version 4.0 of the app, with new and improved features (a recent scaling update has since bumped it to version 4.0.1).
As we've discussed before here at TUAW, Pano lets you take panoramic photos with your iPhone camera by giving you a semi-transparent guide to help you align adjacent shots. You can even take 360° panoramic photos if you so desire; it just takes a steady hand and sixteen photos. Once you've taken all of your individual photos, Pano stitches them together to make a seamless photo like the one you see above (which I took in Miami, FL). The new version of the software not only speeds up the process of aligning and blending your photos together, but sports an improved user interface as well.
If you're tempted by Pano, you'll be thrilled to know that the app is currently on sale for just US$0.99 -- it's usually $2.99, and even at the higher price it's a bargain. Anyone who is a fan of photography on the iPhone should pick up a copy of Pano while it's on sale. You'll be glad you did!