Time for the first update to MAME 0.120. Grab it from the Latest Release page.
This update features a number of nice enhancements. Phil has submitted his System 21 changes, so all those games should be looking significantly better this time around. In addition, a more generic polygon rendering system has been added which makes it much easier for games to offload their rasterization to a second CPU. So far, the Voodoo emulation, Gaelco 3D system, Midway V-Unit, and Namco System 22 have been updated to take advantage of it. Some games do better than others, but if you have a multicore machine, this release should show some noticeably improved framerates for those games.