A new feature on your Kindle courtesy of Shelfari:
"October 19, 2010
Shelfari Book Extras Make Reading Easier on Kindle
We’re excited to announce that Shelfari’s community created content is now available on the Kindle as “Book Extras”. We have integrated with the Kindle App for iPad, iPhone and iPod touch. You can also access Book Extras on the Kindle device and Kindle for Android.
What are Book Extras?
Book Extras are curated factoids by the Shelfari community that provide readers with helpful information while they’re reading or deciding if they should read a book. These Extras include character descriptions, important places, popular quotations, themes, book-specific glossaries and more.
For example, while reading Stieg Larsson’s thriller The Girl with the Dragon Tattoo you can quickly refer to a list of Swedish character names and descriptions without having to memorize Mikael Blomkvist romantic trysts or the Vanger family tree.""
Full details here.