First off, I want to say how much I love the Widgets Reloaded plugin. I use it in almost every project that I develop.
I have a few projects where I am using posts as part of an FAQ, theme or plugin listing, then pull them in to their appropriate sections via a custom page template. These projects also have a regular blog that pulls in the remaining categories.
I am able to exclude categories in the previous/next links, archives.php and category.php template files, but I am not able to exclude them from the Archives widget.
I've found a plugin that adds a cat parameter to wp_get_archives() to limit the posts used to generate the archive links. It's called Archives For A Category by Rob Schluter (http://kwebble.com/blog/2007_08_15/archives_for_a_category), and it works great. However, it requires that I hardcode the call to list the archives into the sidebar, which defeats the purpose of having a widgetized sidebar.
I was wondering if you would consider including this type of functionality in your Archives widget to allow us to exclude categories from the Archives listing.
Thanks in advance for considering this Justin.