Google announced a "mobile version of Google Book Search, opening up over 1.5 million mobile public domain books in the US (and over half a million outside the US)...."

These books were already accessible on Google Book Search but the mobile editions were optimized for small screens. From your iPhone or Android phone, go here to search for mobile editions of the books.

FFO covered an early debate about Google Book Search. (Scroll down the archive.) If you're not familiar with Android, it is an open source mobile phone software platform shepherded by Google.

Flash Fiction Online believes its own flash fiction archive is already optimized for small screens!