I've been using movabletype for two years (and livejournal for at least five), and the MT feature that would really make me giddy would be to have the ability (similar to "friends-only" mode in livejournal) to password-protect individual entries in my database. Currently I have my entire MT blog in a password-protected folder, and I make everyone who comes to my site go through this process of getting a password, etc, just because SOME of my entries are too sensitive for the whole world to see. If there were just a little button I could click in MT saying "secure this entry" or something, oh boy would I be happy.

Just a thought here, but you could use one category for sensitive info and use .htaccess file to password it. A google search will give that if it seems an idea (idea or guess?)

Password Protect Entries