You might be tempted to figure out how many of your friends on Facebook have twitter accounts.

twitter does not support Facebook for finding people you know. There are no mashups that let you do this, because APIs provided by Facebook and twitter do not provide all the necessary information to perform this task.

You get hashed versions of your friends’ emails, however twitter does not let you find people using this information. What twitter needs to do is to hash all email addresses it has, and create a Facebook application to migrate the data.

The current state of web is chaos. Having no standards is really, really painful.