Longitude Delivers an excellent product
We ran two development environment setups and a pilot which is becomming production. Their technical staff was responsive and supportive in helping us get this setup. We are company of less than 150 employees and have a small IT staff - and we were able to lean on the support staff as needed during the setups - a real asset for us.
The product displays nice silverlight previews with searched for tags and properties highlighted. Full views give details like hit count per page,and there are enhanced features right off of the preview - like sending the document to someone. Our company will just be scratching the surface as we propogate this throughout, but the immediate visual information from the previews is compelling.