Baldo Rex, with Boss 302, Friday, December 8, at the Lion's Lair, hasn't yet taken the nation by storm because of a single, fatal flaw: originality. Sure, the band (featuring Phil Wronski, Tom Sprenkle, John Call and Ted Thacker) makes music that might be described as modern rock, but it doesn't conform to the pre-fab notions that currently plague the genre. These guys are funny, intriguing and inventive, as their new CD, I Eat Robots, I'm So Sad, ably establishes. The disc probably won't make them famous, but it won't make them sellouts, either. And that's the main thing.