Just interested in how people's stats compare... 

My best stats show 3.2 views per download, the worst is 17.3.  The average across 7 free titles is 6.5 views / download.

I only have one commercial title here so far, which averages 48 views per purchase - though the first 2-3 weeks had a MUCH better conversion ratio than in the months following.

I have absolutely no idea whether these stats are good / bad compared to anyone else, but would be interested to find out what other people's experience is.