Looking at Mark Harrison's blog, he points out that version 2 of the MOSS faceted search is available.

Not having seen this tool before I thought I would have a look.  It seems pretty useful, but probably I need to test a lot more with many documents before I can really tell.  But it seems to add an element of guided discovery/findability to MOSS search which is quite neat; especially as it is open source on codeplex.

The link to MOSS Faceted Search is here and a demo is here.  The faceted search is made up of 2 web parts.

If anyone has any opinions on this, I would love to hear from you, please add comments of your experiences/impressions of this tool.