Another option: PlusCaChange vs. Demeter mic fight on tinychat, and someone records it and posts it to the forum via vocaroo.
This has pros and cons.
Pro: Less meaningless work for me, also more entertaining to eBaumers
Con: Someone neutral would have to moderate the debate so that no repetition or dismissal of issues would take place, and we would completely finish talking about a single issue before moving to the next, therefore no one (meaning me, since my arguments will be the most thought out and thus take longer to cover), would be overwhelmed by a barrage of stupid assumptions. Also it would have to be agreed that no one else would speak.
Also wouldn't so easily be able to cite sources.