Statistic solution

Question

Hi,

i need a solution for the following problem:

1. Lets say i'm employing a "branch" website, where some shops can publish their data, like addresses, openinghours etc.
2. I want every shop to have a login where he can lookup some statistical data, such like unique visitors for example...

My question now: Can you think of the easiest way to do this ( the part with the gathering and viewing of the statisitcs) ?

What i was thinking about:

1. Use google analytics for tracing
2. Use the "export as xml" function of google analytics
3. Parse the result / Assign it to the customer ( e.g. if the address of the shop was http://mysite.com/customer023 )
4. Write it to DB
5. Use OpenFLashChart to show the statistics

This seems like a very high amount of work to me and iam trying to figure out a better solution ( even if its not for free )...

Any ideas?