Hey Curtis,
Right now, there is no support for persisting binary blobs. The reason we haven't added support yet is because most people tend to store blobs when they want to keep their application objects "as-is" without having to schematize them or separate them into various relational tables. Since Concourse is schemaless and everything is automatically indexed, we prefer to have applications store object fields directly in Concourse.
With that said, there are some legitimate instances when people still would like to store binary data, so its on our roadmap to add. I'm happy to bump up the priority if its something you think is important. We could even get it into the 0.5 release that is scheduled to come out at the end of this month :)
Cheers,
Jeff