I like the idea -- a lot of these kinds of tools are introduced with a secondary bias. A show focused on the elementary level would be welcome. I also think the time slot works pretty well. For show theme topics, it would be good to build on earlier shows, and structure them in such a way that they could collectively form a PD class for teachers. Along those lines, I would probably move RSS up so it's covered earlier. You'll refer to it with blogs, wikis, podcasts, etc., and it would be good if you've already discussed it. With student safety and other social/ethical/human issues, you may want to intersperse them more rather than clumping them all together. Maybe once a month you do a show about those types of issues, or devote a part of each show to those types of things. If you have 2-3 shows in a row about it, you might start to lose people. Another possible topic: we got a lot of mileage out of Protopage (www.protopage.com) this week. The idea of a customized portal page is new to a lot of teachers, and the fact that you can also use it as an rss aggregator, repository for bookmarks, and podcast reader make it attractive/useful.