Prepopulate Calendar Events with Just Type and UberCalender
UberCalendar is an extremely powerful patch in Preware for both webOS phones and the TouchPad that will greatly enhance the capabilities of stock calendar app. Among those enhancements is the ability to configure a new calendar entry but using the Just Type functionality of webOS. For those that remember Quick Event for webOS 1.x devices, UberCalendar works very similarly. Just by entering text in the format of "Subject ; Date/Time ; Location" and then tapping the "New Calendar Event" Quick Action in Just Type, an new calendar event card will appear for you to add any additional details before saving. Note that you need to use a semi-colon (";") between the three options, and the date/time and the location are optional.
Note that if you enter a date or time incorrectly, the entire input text will just be entered as the subject of the calendar entry and you will need to manually set it in the entry.
Source: webOS Nation Forums