Hi,
On the module ItemPublisher we can filter almost everything in Querystrings, the "almost" limitation being we can't filter "checkbox lists" (at least it's the only one we've encountered problems with querystring filtering so far).
Converting news to items, and using the categories as checkboxes, we loose the ability to filter by category if a news belongs to more than 1 category.
We tried applying the wildcard to the value with no luck.
Best Regards,
Nuno