From the homepage:
* PinMAME, PinMAME32 and Visual PinMAME 1.59 released
* Full OKI 6295 chip support for Gottlieb System 3 games!
* Added support for Addams Family Values and Rock Encore
* Added preliminary sound support for Zacaria prototype series
* Added... you know, I typed all of that stuff into whatsnew.txt just a few minutes ago! ;)