Some hosted blogs providers include a podcast option (well Blog City do).
I'd suggest there are considerable benefits of associating the podcast with other communication software. For instance, by including the podcast with a Blog then you can use the podcast to hook interest, direct them back to the blog for more info / widen the scope of the information being provided, and then encourage comments / feedback.
An example is ...
http://blackboard.blog-city.com/fireside_chat_23rd_june_06.htmSo people can leave comments, while information can be drip fed from hte podcast to the blog - including links etc.,
It will be very interesting when the VLEs start to deliver their podcast modules/building blocks, then it will open up the use of other communication tools (discussion boards) and collaborative tools (wikis). Very simple technologies, effectively deployed, and the effective is down to learning design.