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1. Group each meeting's tasks into a project and give a due date. That is the best you can do in the GTD Next Actions list. You should manually place the meeting times in a calendar. Due date or notes should be enough to link project with calendar event.

Having said that, OF is the Next Action list. GTD systems have three more parts:
Reference Filing
Tickler
Calendar

OF could become an In Basket rather than just a Next Action list by making it easier to move hard-scheduled events into iCal, and by having some sort of Tickler functionality. (Makes it easy to dump files/web pages into the basket by allowing the notes feature to link to files/web pages. Once dumped, you process and move the files/pages completely out of OF and into your reference system.)