A typical splatbook race: fun abilities, but nothing to set it apart and barely any support.
Maenads have very little going for them: they get two bonus power points, 1/day Sonic Energy Ray, and a rage-like ability that increases strength at the expense of intelligence and wisdom for 4 rounds a day. That's a bad combination on basically anything except psychic warriors, and even psychic warriors have tons of other races they'd rather be.
Then again, this is the thread that gave by-the-book goblins +0 LA, so I don't think it's fair to condemn maenads to -0 purgatory. +0 LA, but please ask your DM for a buff.