Fixes / Should fix
http://code.google.com/p/morphia/issues/detail?can=2&start=0&num=100&q=&colspec=ID%20Type%20Stars%20Status%20Priority%20Milestone%20Owner%20Summary&groupby=&sort=&id=377
promote the serialized converter to a field so we can properly shortcut serialized conversions rather than relying on ordering