WebTrends replacement

[Claude Jones]

A previous employee had purchased WebTrends to monitor our Website with. I now 
inherit this task, and I'm wondering if there's an open source alternative 
that people like. They're hitting us for a $1300 support renewal, and I'm not 
convinced its really needed. I'm looking at the various projects out there, 
but is there anyone familiar with WebTrends and the oss alternatives who has 
some observations they could share on the subject?  FWIW, our website is 
hosted on an IIS server. 
-- 
Claude Jones
Bluemont, VA, USA