Opions?

[ZiNgA BuRgA]

You can do that with the $filters_set variable to some degree.
Example:

HTML Code

<div style="{$filters_set['__xt_prefix']['visiblecss']}">You are filtering by prefix [<a href="forumdisplay.php?fid={$fid}">remove filter</a>]</div>

---

or similar.
Can use Template Conditionals to add to the breadcrumb if you wish.