Well, I used to record all my notes relevant to tasks in MLO, though now I'm using OneNote at work (and that's a brilliant way for recording meetings, if you have it integrated with Outlook and can pull all the meeting information, attendees list, etc, from your calendar).
In MLO, I would record any relevant phone calls or other activities in the note text for the relevant todo item, with a date stamp (using Ctrl-D hotkey, in my case) in front of each note.
If I have a particular series of meetings, I tag any relevant tasks with the relevant meeting type (eg "progress", "technical" or "commissioning" meetings). I can then filter my tasks and folders by meeting type and/or apply a text filter for those which have a specific date stamp in the notes, to get a shortlist of all the items which need discussion at the next meeting.
Personally, I wouldn't try to use MLO to record full meeting minutes to share with other people, as it takes to much filtering, exporting and then reorganising in the document. However, you could set up your outline so that you keep the general meeting discussion and the header (participants list, etc) in a folder-note, then place all the tasks related to that meeting series (along with their progress notes) as children of that folder.