the two free ones I use when I don't have access to web logs are... http://extreme-dm.com/ - visible icon, slow updates http://www.statcounter.com - invisible icon, real-time updates, really truncated results
What features I'd look for? besides the usual stuff free counters have by default (referrer tracking, uniques/raws, prognosis, country/browser analysis,...) I'd also like to see more advanced features like proxy %s
Shouldn't there be one that you can use just by modifying you .htaccess file? Updating numerous pages just seems like a waste of time.
You could use the htaccess file to forward all traffic to a specific logging php script. This script would not all the statistics and pass the information off to real target file. This way all that you would have to do is make the needed updates to you htaccess file and copy a php file. Now, this might not the be the fastest way to log, but it would be great for small sites who look for custom, live statistics and who are using a third party host.