As you may or may not know, in addition to my Geography for Travelers podcast, I also do a short, 5 minute travel and tourism news podcast on the Podcaster News Network called Travelography. The Podcaster News Network was founded by Todd Cochrane of the Geek News Central podcast. There are currently some 50 podcasts (each about 5 minutes or less) at PodcasterNews.com, and they are pushing to double that number in a very short time.
In my opinion, this is a great opportunity for anyone interested in developing a travel podcast. There are currently only two podcasts in the Travel section of PodcasterNews.com, mine and A Road Warriors Guide to the Planet. Note that it does not have to be a "news" podcast, as quite a few are more along the lines of advice columns.
If you are interested, read this Application Information -- and tell them that the Travel Geographer (Alan A. Lew) sent you!