Add some method of address book support. I don't want to add a database (although with persistent and yesod it is pretty easy to use sqlite) so we would need some other method. Not sure what options here. Also don't know if we want to write all the address book management or just use contacts from somewhere else.
- google contacts - google has an api to manage contacts, not sure if there is a haskell binding. Here is the API
- LDAP - haskell has an LDAP library. We would then have to run an LDAP server which I don't do now.
- .addressbook file/sqlite