He's referring to Access Services, a feature in Sharepoint Enterprise Edition that allows one to publish a web database (via Access 2010) straight to the server, so that it can be accessed by any standards compliant browser. Do you offer this?
well ... i haven't heard of any hosting company which provides this feature but SharePoint Server 2010 has this feature. Access Services is a service in SharePoint Server 2010 that allows administrators to view, edit, and configure a Microsoft access application within a Web Browser.
Sharepoint itself is not suited for shared hosting. This is because it requires special permissions that is not conducive to the security requirements on a shared hosting environment.