Review my $1.99 iPhone app
gsiener: Haven't used the app, but 2 things:1. Would be nice to support login via openid.
2. I've been using a Highrise to LDAP proxy with moderate success with Address Book for OSX. I think I'd rather see that sort of integration with the address book than a separate app.
(proxy link: http://giantrobots.thoughtbot.com/2007/5/22/highrise-to-ldap...)