We are actually considering to implement the components from AvePoint. But we have run into a little problem. We are currently using MOSS 2007 over SQL Server 2005 and as you know the only way to store BLOBS externally is to use the EBS interface provided by MOSS. This is not a problem in itself, AvePoint will provide support for both MOSS 2007 and Sharepoint 2010 (EBS and RBS).
We were also planning to use NetBackup to granularly backup our Sharepoint farm but understandably NetBackup won't be able to handle External BLOBS with the NB Sharepoint agent. Of course this can be done by running a separate job on the file store where the BLOBS are located but how do we make sure that the two streams are consistent so that we can both restore from a disaster sucessfully and also be able to restore single items if needed?