Folks with an iPhone or iPad invested in Amazon's ebook service will be happy to hear that it has posted a solid update for its iOS Kindle client today. The update brings the app to version 3.9, and offers a handful of new features and improvements.
Perhaps the most noticeable change is the new Free Sample Search feature, which allows you to search through Amazon's extensive Kindle library to download free samples. And the Bring Your Own Dictionary option pretty much speaks for itself...