For those of you who want to subscribe to one RSS file that consists of updates for all Burningbird Network weblogs (sans the Wayward Webloggers, which is separate), you can use the Burningbird RSS file.
I generate this file once every hour, pulling together recent entries from all of the weblogs. It features the ten most recent postings across the Network. Note that it is in RSS 1.0 only.
Additionally, the Burningbird Network home page lists excerpts from all recent entries.