— Update: no longer Exchange based, now iCalendar format —
Just to let everyone here know, I’m currently working on an interface that takes ticket information based on due-dates and ports them over to a shared Exchange calendar. A slightly modified version can be made available that you could run against your own default calendar, too.
1st draft is working quite well, and I still need to flesh out a few details.
Essentially, it will create an all-day calendar event with an 8-hour reminder (will need to add code so this accommodates weekends). Basically - whoever is assigned the ticket will get a reminder as they will be placed on the schedule of the appt.
So, if the ticket is not in a ‘closed’ status, it will populate the calendar with an entry.
Prior to populating the calendar, the script will clear all calendar entries that have 'Ticket: ’ in the subject (configurable) to prevent duplicate entries.
Since this is Exchange, the following is assumed:
The assigned to email address is in the Exchange system, and can therefore resolve to a named recipient.
Requirements:
Obviously, Exchange.
Right now, it requires Outlook to be running on the box where the script runs. I need to work on this part so it merely requires running with the Exchange SDK, but again, this is first revision.
Check the attachment for a basic sneak-preview.
I’m thinking about also add in IT services dates - sometimes it’s nice to see them in a calendar format.
I think that I will work on getting this into some other format that will allow you to attach to it through your email client, rather than plugging into Exchange directly (for other folks who have something other than Exchange). However, this could be really handy for those that synchronize their mobile devices.
Just wanted to get everyone excited, that’s all. 
— EDIT —
Here’s a link to the final script that actually exports the ticket info to an iCalendar (.ics) format. Compatible with Outlook, etc.:
http://community.spiceworks.com/scripts/show/621-spiceworks-to-ics-calendar-inteface-script