Go for it! I'll try to remember about the net on Wednesday. Many of the nets that I've participated previously were more or less free association nets, without a particular subject which was chosen prior to the net. I suppose one format could be a discussion of current events, and as the events were discussed the net participants could offer suggestions or they could seek input regarding issues or subject which concerned them. This would be spontaneous, but it may offer more relevant information regarding a troublesome issue. For instance, perhaps someone is having an issue with their green beans not growing well, or their chickens are laying eggs everywhere but the nesting box.
In any case, it would be a good idea to set-up a planned net in the event of some catastrophic event, i.e., a massive electric grid outage, or a flu pandemic. I'd have to give some more thought to that.