You might want to take a look at iRT Calendar. I don't know what the layout is on the Pre, but they've put out a high functionality calendar replacement.
Current features:
Multiple calendar support
Event icons
Day view
Week view
Month view - show icon, title, or both
Week/Day views -- display ISO 8601 week number
Quick goto (day/week/month)
Advanced saved search
Quick search All (title/location/description)
Duplicate events
Move events to Today or next day
Preference for default view -- day/week/month
Preference to start days on Sunday or Monday
Preference for 12/24 hr format
Configurable view style
Time from now
Current/Next event indicator
Multiple backup on SD card
Next event widget
Pro Version to come should offer even more features (many of which were available on Palm, that personally I'm looking to have again)
Custom Repeats -- like repeat every other week or every 2 days
Custom reminder
Float events
Mark as complete
Font style option
Font color option
Font background color option
Snooze individual events
Integration with Tasks Applications
Lock time zone preference (being evaluated if possible) -- good for travellers to lock on any time zone
Event Templates
Quarter Year View
Holiday View
Day View with time increments with the convenience of just entering the title
Quick New Event
Add/Edit icons
Single event display widget with next event button
Month view -- scroll events up/down
Month view -- event/icon filter
Screen shots available on their website. Check it out - see if it's what you're looking for.