Two more stats programs today:

Deep Metrix:

http://www.deepmetrix.com/livestats/net/index.aspx

They have several different programs - we'll focus on the commerce one since we're interested in tracking sales as well.
http://www.deepmetrix.com/hosted/commerce/index.aspx

ROI - YES
Normal search stats - YES
Reports - YES
Your server or theirs - Theirs
Multiple sites - NO
Cost - ~ $200.00 / month

Urchin
http://www.urchin.com

Urchin has different modules that you "plug in".
Here's a nice master list of features.
http://www.urchin.com/products/feature_list_master.html

Again we'll go for the campaign module.

ROI - YES
Normal search stats - YES
Reports - YES
Your server or theirs - Either
Multiple sites - Yes (increases cost)
Cost - around 5 k -
http://www.urchin.com/products/purchase.html

Tomorrow we'll have the weeks wrap up.
Tim