I just set up a workflow that was triggered off the results of a meeting, and it seems to be working. There isn’t anything listed as “activity” in the potential triggers, as there is in reporting, so it’s a little confusing. But there is an option for “Meeting” and “Call”. I set one up so that if a meeting happened more than a day ago and the meeting outcome hasn’t been updated, the deal owner is emailed with a reminder and a task is created to remind them to update.