I've had a custom journal system at my site called ChocoJournal running vBulletin 3. It's proven to be extremely popular on my board and is a work in progress.
Within a one year period, these are some numbers:
Total Entries: 29,559
Total Journal Views: 1,352,226
Total Comments: 101,983
Here are some of the features:
- Complete integration with vBulletin 3 (postbits and profiles)
- Anyone can start a journal with two clicks.
- Simple quick commenting system
- Top 10 Journals by Warks function which uses a complex formula to calculate popular journals.
- Ability to search Journals entries.
- Integration with vBulletin's Buddlist.
- Option to create private entries (only buddies can view)
- Option to view most recent entries from all buddy journals on one page.
- Comment tracker system showing you the latest 50 comments made in journal.
- Ability to view last 20 comments made by any user.
- Full integration of vBcode / smilie code in comments / entries.
- Journal control panel
- Journal ban list allows users to ban users/guests from viewing and commenting in your journal.
- Journal custom image allows users to upload a custom journal banner that will be displayed at the top of their journal.
- Users can put custom static messages in their journal.
- Random journal entry on the front of the journal system.
Check it out here:
http://www.gamingforce.com/forums/journal.php
If enough people are interested, I might package it for release.