For a future version it would be nice if it could be made possible to set the priority setting so that pages at different levels of the site were designated with different priorities. Ideally, a simple way to select the priority for any page would be nice, but realistically, just being able to tell the program that Level 1 pages = Priority 1 and Level 2 pages = priority .75, and Level 5 pages = priority .25 (or whatever settings one might choose), and so on, would be very helpful.
As it is, one really needs to choose a single priority for all pages or go through the resulting sitemap line-by-line, and neither option is truly realistic for a large site.
Just a thought,
-Danny.