Two Part Question- CCK Views and Multiple Site Sharing of Content

I'm not sure if it's poor etiquette, but I have two questions on a project.

1. I have a content type created with CCK that is primarily numeric data and can properly display it with Views. However, I need to create reports from the data that need calculations (sum, average) of some of the fields. Any thoughts on how to approach this?

2. The main site is a repository of many pieces of CCK content (events, news, data) that users are contributing. Some users want/need their own site and would like to display their content from the main site. Other than doing multisites or some kind of wrapper in another install, is there another approach?

Thanks.

Bruce