CRM - SharePoint Integration through middle web services

Hi everyone,

Recently I'm working on a CRM project that requires integration with SharePoint. My client wants to have a middle web services (WCF) in between CRM and SharePoint. Something like this CRM -> WS -> Sharepoint. 

The basic scenario would be, from CRM:

- Create folder or document library in SharePoint

- Send documents (binaries) to programatically to SharePoint

- Create new site collection if the existing one is nearly full 

Is there any difficulty if we're doing this ? Would it work with future version of CRM and SharePoint ? Would it work with List Component ? Would it work with Server - Server integration ?

Thanks for your help.