There is now a "HOWTO: a 'Custom Query' PAGE template" in the gold forums.
This page template will allow you to use one template on any number of pages and craft a query to show posts on that page.
Want to show all the posts in a category - you can do it
Want to show all the posts for several categories - you can do it
Want to show all the posts for a tag? - you can do it
Want to show all the post except those from a category? - you can do that
Want to show all stickies? - yup, you can do that too
It will pick up all the theme settings and look just like the 'Posts' page, except it will only show the categories you specify. It works with Atahualpa 3.5.1 and WordPress 3.0
The 'Gold' forums are avaliable to members who have donated $20 or more.