There are a couple elements to this idea. The first is having an organized #fudcon-room-* channel for each physical space we have, complete with a meetingbot instance and any other tools people might want to use. Depending on the kind of session, running gobby and other tools will also go along way to helping things along. I'm assuming the people on the ground can help out here because they know what the rooms are. Setting something up like this is pretty low level work.
The second element is the logger. This is someone in each session who is recording the conversation and taking notes via IRC. He's (or a she, but i think FUDCon is still mostly attended by guys) also taking comments from IRC and repeating them to the group. This requires making sure there are enough volunteers. This also means making sure someone is tracking who the volunteers are and are enforcing enough typing breaks. Having done this before, i can tell you it can be stressful to do this for an entire day. Yes, you're a nerd, yes, you type all day, but you don't type at this pace for long stretches. Finally free drinks are involved, anyone who volunteers gets a beer (or other beverage, or well any other reasonable consumable if you don't drink) from me, as a thank you.
The third element is you. To make this worthwhile, you will need to interact with it. If you're at home, use it to follow that session you really wanted to see. Ask questions. If you're at FUDCon, hang out in channels to follow two sessions at once. Find out if there's a session more interesting than yours. Use the extra information to decide where to be. Finally, provide feedback. Let us know how it worked out.
The last element is the organisation. Since i only got a couple of volunteers so far, i want to do things a bit differently. This should solve a few issues all at once. Let's take a page out of Google's playbook. At the Google Summer of Code Mentor Summit, as part of each presentation, the guy running the session was required to ask for a volunteer to log the session. Let's take this route. For everyone giving a session, before you begin, find a volunteer in the room. There's a good chance that someone in the room already has an emotional investment in the session and will be willing to document things. One of the organizers (the original volunteers) will make sure to monitor the channels and update the wiki after each session. This way we know who's been volunteering.