Would it be possible to code some sort of hack/fix to produce Popup_key LOV functionality into the built-in tabular form functions. I understand the issue with requiring items to hold both display and return values, but perhaps there is an Ajax solution with a hidden field.
With your apex lib framework the Apex ‘built in’ tabular form function is now capable of producing production quality solutions. The lack of a workable Popup_key LOV solution is the last nut to crack.
There is loads of stuff on the forum: