If you happen to want/need an Android smartphone from Verizon Wireless, Amazon Wireless has a special promotion that gets you a selection of phones for good prices (some are 1c), along with a free $25 Amazon AppStore credit.
You can use this $25 credit to purchase some of the paid Photography Android apps, including Vignette, PicSay Pro, Pocketbooth, Retro Camera Plus, Camera 360 Ultimate, FlickFolio, Photography Calculator, and more. Some of the apps have a "Test Drive Now" option - you can run them in an emulator in your browser before purchasing! (you can use the $25 credit on any app in the Amazon Appstore, not just photography-related). Even if you are not interested in a phone, there are plenty of free photography apps (free apps often have advertising)
Participating phones include:
+ 1 cent only: Motorola Droid X, HTC Droid Incredible, LG Vortex and Ally, Moto Citrus, Samsung Continuum
+ various prices: HTC Thunderbolt 4G, Motorola Droid 2 Global, Droid Pro, etc
+ the discounted phone prices, as usual, require a Verizon contract
+ this promotion ends on May 1st, 2011