Do you support FILESTREAM in SQL Server 2008? http://technet.microsoft.com/en-us/library/bb933993.aspx
It's not because it cannot work on a hosting environment it is more difficult to implement it on a shared hosting environment. Remember, on a shared hosting environment security is setup differently then a dedicated hosting environment to protect the other accounts.
The main problem is with maintaining quota with the file stream data. SQL has it own quota limit on a per database basis but this doesn't apply to data located in the disk system.
