hi Logos,
as one of your strengths is lightning fast multi-level cross-referencing (especially with orig language Bible and other works), supporting works in modern biblical studies will help students/researchers in their works. in particular, more scholarly works from contemporary experts, e.g.
- Gathercole's 'Where is boasting?'and 'The pre-existent son' loaded with references to Bible and 2nd temple Judaistic works which are supported by Logos
- More recent works of Watson, e.g. 'Text and truth', 'Paul, Judaism, and Gentiles', and his upcoming 'Gospel Writing: a canonical perspective', same nature
- in general scholarly works on biblical studies, even if the audience is not as wide, those interested will be willing to pay the price, especially if the price of the hard copy is already very high, this is one example:
http://www.amazon.com/Heralds-Good-News-Supplements-Testamentum/dp/9004116915/ref=sr_1_1?ie=UTF8&qid=1355179003&sr=8-1&keywords=ross+wagner
these past few months, after being spoiled with the Logos' version of Bavinck and Wright's 3-volume works (the hard copies drove me nuts as i had to keep flipping my bible back and forth to look up the references)
one can't be blamed for asking for more 
thanks and gb, eko