I need help custom querying blobs. Can anybody get JDO BlobInfo query to to work?

Can anybody get a custom BlobInfo JDO query to work?

I can't figure out how to do a custom query on the Blobs?
http://code.google.com/p/gwt-examples/source/browse/trunk/DemoUpload/src/org/gonevertical/upload/server/BlobInfoJdo.java

This GQL works to query blobs: "SELECT * FROM __BlobInfo__"
http://code.google.com/appengine/docs/java/javadoc/com/google/appengine/api/blobstore/BlobInfoFactory.html
- api reference to custom querying

Reference:
http://demofileuploadgae.appspot.com/ - This is my demo where someone
can test uploading a file to the blobstore.
http://gwt-examples.googlecode.com - my gwt examples

Thanks for looking,
Brandon

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