For a write-up we expect an evaluation of the presentation/discussion/assignment, and a page of resources that will help find information about the topic. If the person/group presenting has already put together such a resource your job will be simpler. You should certainly talk with the person/group you are writing up.
Up to three people can write-up a subject, each person should, individually, comment on the presentation. People can collaborate on providing the web resources.
Email your topic preferences to Owen Astrachan. Preferences will be accomodated FCFS.