Update 2: Although EA has yet to comment, we've now heard from NPD analyst Anita Frazier, who suggested that Boom Blox just got lost in the shuffle of great games that have been released recently.
"It's still really hard for new IP to breakthrough the noise in the market, and there has been a lot of noise so far this year. Between Super Smash Bros. Brawl, GTA IV, Wii Fit, Mario Kart and the upcoming Metal Gear Solid 4 (to name a few), there have been some really high profile game releases. The game was really well reviewed so I'm suspecting the marketing just didn't break through the clutter to the extent that they were hoping for," she commented.
1
"It's still really hard for new IP to breakthrough the noise in the market, and there has been a lot of noise so far this year. Between Super Smash Bros. Brawl, GTA IV, Wii Fit, Mario Kart and the upcoming Metal Gear Solid 4 (to name a few), there have been some really high profile game releases. The game was really well reviewed so I'm suspecting the marketing just didn't break through the clutter to the extent that they were hoping for," she commented.