Published by Steve Litchfield at 16:15 UTC, September 7th 2006
A. S60's Calendar application has supported entry 'descriptions' since 2nd Edition, Feature Pack 3 (that's the N70 and N90 to you and me). These sync perfectly to the Outlook field you describe and are mainly for adding detail to an entry so that the main entry text doesn't have to be too long. They're also perfect for people who like to keep a diary or journal.
To add a description, while editing an entry, use 'Options | Add description'. There's even the option to use the text from an existing Notes entry, in case you've previously typed or pasted some text in there, or of course you can simply start from scratch.