Over the weekend MAME 0.80 was released. Updates and new games since 0.79 (including changes made in the 0.79u1, 0.79u2, 0.79u3 & 0.79u4) are:

• Area 51 (Nov 15, 1995)
• Atari PSX
• Battle Garegga (Austria / Hong Kong) (Sat Feb 3 1996)
• Battle of the Solar System
• Bongo
• Botanic
• Bulls Eye Darts
• Cool Boarder Arcade Jam
• Double Cheese
• F-15 Strike Eagle
• F-X
• Galaga (Midway set 2)
• Galaga (Namco rev. B)
• Great Sluggers (Japan)
• Hunchback (Galaxian hardware)
• Kung-Fu Taikun (alt)
• Kusayakyuu
• Lethal Enforcers (Japan ver JAD)
• Lethal Enforcers (US ver UAE)
• Mad Alien
• Mahjong Electron Base (parts 2 & 3, alt., Japan)
• Mahjong Electron Base (parts 2 & 3, Japan)
• Mahjong Electron Base (parts 2 & 4, Japan)
• Mahjong Neruton Haikujirada (Japan)
• Martial Champion (US ver UAD)
• Psychic Force EX (?)
• Quadro Quiz II
• Quasar
• Quasar (Alternate)
• Quiz 365 (Japan)
• Radikal Bikers
• Samurai Shodown III / Samurai Spirits - Zankurou Musouken (set 2)
• Shanghai Matekibuyuu
• Sorcer Striker (World, alt)
• Soul Calibur (SOC14/VER.C)
• Space Fever (black and white set 2)
• Space Fever (color set 2)
• Space Launcher
• Speed Up
• Strikers 1945 (Alt)
• Super Slam (alt)
• Super Tank Attack (prototype?)
• Surf Planet
• Talbot
• Teenage Mutant Ninja Turtles (US 4 Players, set 2)
• Tetris (bootleg set 2)
• Time Pilot (Atari)
• Violence Fight (US)
• Wiggie Waggie
• Zintrick / Oshidashi Zentrix (hack / bootleg)
• Zoom 909

Also new and worth checking out on the MAME from is m.a.w.s., which is an online database of all MAME ROM information.