SALES ANALYTICS for MAGENTO MULTISTORE v1.0.0m has been already released with full support for Magento Community Edition v1.5.0.0 & later.
You can use Sales Analytics for Magento Multistore to get sales reports for each store in your Magento installation, together with the global totals.
You can also rate and comment this extensions in the Magento Connect directory.
We really appreciate any feedback you can send us on these products, because that sets the path for further improvements.