Sort Tablesort by Computed Field? I am using an EntityFieldQuery with ->tableSort() and then adding a few columns to each row programatically. Is there a way to have tableSort() sort by my computed fields instead of only raw db fields? (Note: I don't mean the module Computed Field - which I now realize is probably the solution.)
Unfortunately not; an EntityFieldQuery is just an interface to a normal SQL query.

All values for computed fields are determined after the data has been loaded from the database (in the _computed_field_compute_value() function) so this won't be possible using the TableSort extender.