Crist. More information and downloads are available at http://code.google.com/p/ facebook-actionscript-api/. Java Facebook used to provide an official Java Client Library, but it has subsequently been discontinued. The facebook-java-api project has taken over with an open source version, which you can download at http://code.google.com/p/facebook-java -api/. Ruby on Rails Check out the Facebooker project at http://facebooker.rubyforge.org/. It's conven- iently packaged as a gem, so you can just gem install facebooker . Qt+KDE Linux developers should check out the libkfacebook project, which is an asynchro- nous, GPL-licensed library for talking to the Facebook API with responses mapped to C++ objects. You can grab the source from Subversion at svn://anonsvn.kde.org/ home/kde/trunk/playground/pim/kfacebook. VB.NET Independent developer Jay Lagorio has released a Client Library for Facebook that supports the API version 1.0 in VB.NET. More information and downloads are at http://www.lagorio.net/windows/facebook/. You need to create an auth_token and then instantiate a session before you can make most of the calls in the API (but not, obviously, before you can make the calls to generate them). See Recipes 9.9 and 9.6, respectively, for more information on those processes. 9.11 Logging Out Problem How can I give my users a way to log out of Facebook? Solution and Discussion Just send them to http://www.facebook.com/logout.php?confirm=1. 9.12 Getting Allocations Problem I need to retrieve my allocations from Facebook so that I know how many Notifications I can send out per day. 9.12 Getting Allocations | 315