It was mentioned on Adam Curry’s Daily Source Code today that iTunes 4.9 (the one with podcasting support built in) is to introduce support for a new “pod” XML namespace to extend RSS 2.0 and add tags that will work with iTunes, including a synopsis, the option to be excluded from the iTunes Music Store, an explicit tag and more.

It sounds like iTunes 4.9 will be out within the next 2 weeks or so. The specification for this namespace hasn’t been published yet so I don’t entirely know what’s involved, but Feeder users can be sure these tags will be supported in future versions of Feeder as soon as possible.