User converted content can also be optionally be downloaded via Whispernet for $.10 per document. (wiki.mobileread.com)
Sprint is already host to the Amazon Kindle Whispernet service, which provides wireless delivery of eBooks to the popular eReader and serves to distinguish the Kindle from its competition. (bgr.com)
Notes and highlights get synced over Whispernet with other Kindle apps and ereaders and get saved to a text file for easy reference and exportation. (the-ebook-reader.com)