Thanks very much for the kind words! We're not inherently opposed to integrating with apps other than iCal and Mail; given that we have more feature ideas than we have time to work on the apps, starting with the applications that are installed on every Mac OS X users' machine offers the best return on our development time.
Entourage support is one of the things that we've got on our radar screen - if you'd like to officially add a vote for compatibility, you'll want to send email to
omnioutliner@omnigroup.com so the support ninjas can add your email to our development database.
I don't do much word processing beyond the built-in TextEdit application, so I can't really make suggestions of any real depth. I know some folks are big fans of
Scrivener, while folks of a screenwriting bent prefer
Final Draft. (
Mellel also has a following.)
For email, Mail Entourage, and Thunderbird seem to be the big apps on the scene.