I am a big fan of Awstats. I check it regularly to track my site's SEO.
But now that I'm surpassing 10,000 hits per month, with over 50 articles of different content, there are just too many entries in keyphrases and a limitation of awstats is that it doesn't track dynamic urls - just the base url - so I don't know what's going on in my forums. I need more granularity.
So, it would be nice to add an addtional stats reporter. And it needs to be free, because I will request my host to install it.