* Test coverage of multiple-db situations
* Test coverage of close-and-reopen db situations
* Metadata stored in db files
* Bring code coverage up to 100%
* Documentation
* Standalone examples (i.e. not just "please see the test suite")
* Find rows by value of blob-valued field
* Automatic zlib compression of blobs (:zblob type)
* Automatic yaml serialization of arbitrary Ruby objects (:rubyobj type)
* Refactor column value transformations (e.g. for foreign-key rows, blobs, [future] zblob/rubyobj, etc.) to be more regular and uniform

Legend:

! --> highest priority
* --> standard priority
- --> low priority