The first update to MAME 0.125 is now posted on the Source Updates page.
The big news in this release is that World Rally -- long thought to be unemulatable -- is now up and running, thanks to some help from Gaelco S.A. directly! Even more exciting is that Gaelco has officially offered the World Rally ROMs for free download on their site.
Please note carefully that these World Rally ROMs are only available for personal, non-commercial use. In fact, there is already concern that some folks are out to make a buck off of the released ROMs, since they include the coveted protected Dallas code. If we hope to get additional help in the future, please do not abuse the kindness of the folks at Gaelco!