Hi Becky, the best way I know of to try and get Microsoft involved with your org in a greater capacity than they do here at TechSoup is to locate a Microsoft Partner near you. They can propose a project plan to Microsoft and they may or may not be interested in using the project as good press and community involvement. Keep in mind that there are a lot of people hammering at Microsoft's door, though. IMO, your best bet to get into Microsoft's donor door is to find a Microsoft Partner that can help (I've linked microsoft's partner locator, find one near you that specializes in sharepoint). Otherwise, you may be looking for grants.