Here's how you can create value as a webmaster using Google Analytics as a service offering.

• Setup & Configure Google account
• Train Client on how to utilize reports and perhaps create them on their own
• Support Clients with training and empowering them to administer GA on their own
• How to implement it? You paste a snippet of Javascript that Google provides us into their site template

What does it give me

• GeoTargeting - determine what geographic area the client's customers are coming from
• Vistor Segmentation - determine who is visiting your site. (repeat customers, new customers, conversion metrics)
• Trend Reporting - where do people enter and how long do they stay
• Funnel Visualization - determine where your users leave in the conversion process
• Keyword Source - Determine what search terms people use to arrive at your site
• Referring sites - determine where people are coming from

Best of all

• No recurring cost - it's a free service
• Quick Turn around on data after setup and implementation is completed.
• Another potential add-on/upsell to this could be custom page ranking monitoring.

Related links:
http://www.semphonic.com/
http://www.actualmetrics.com
http://www.unilytics.com

http://www.iqcontent.com/services/google_analytics_services/

http://www.analyzeyoursite.com/products_the_basics.asp
(Analyze Your Site - The Basics $695)

http://www.roirevolution.com/learn_more.htm?gclid=CNLT0MPFr40CFQQ3OAodnBAH1Q
(ROI Revolution has packages from $450 - $3k)