I recently received a review copy of An Interpretive Lexicon of New Testament Greek by G. K. Beale, Daniel J. Brendsel, and William A. Ross. This text is an effort at classification of the logical relationship between propositions in a text signaled by particular function words in NT Greek. For each word discussed it offers a synthesis of information from BAGD/BDAG, an analysis of the function word based on key logical relationships from discourse analysis, and reference to Daniel B. Wallace's Greek Grammar beyond the Basics and Murray J. Harris' Prepositions and Theology in the Greek New Testament as key texts for additional information.
There are a number of benefits to this text for the exegete. It helps to move the examination of words from the realm of lexical meaning, which with function words can be difficult and vague to pin down, to the logical relationships which they signal, which is usually the more important goal of exegesis. It gives a handy codification of these logical relationships which expand possibilities for understanding; the extended chart of this codification on pp. 8-12 is about worth the price of the book alone. It enables a better sense of clause and sentence structure and thus the flow of the argument for any particular text. It also enables a more judicious use of BDAG, which can sometimes be a little overwhelming in its detail.
All in all, this is a great little text to acquire and will prove helpful for tracking the flow of thought in exegesis. I think the list price of $15.99 is pretty steep given the book's diminutive size; the Amazon price of $11.95 is a little better, but I think the book would be a steal if it were available at under $10.