Amazon.com is pushing further into the audiobook format. The company said today it has bought Brilliance Audio, the largest independent publisher of audiobooks in the country (release here). Brilliance is expected to continue operating out of its offices in Grand Haven, Mich. Amazon didn't say how much it paid for Brilliance.

Separately, Valleywag is speculating that Amazon might be interested in buying iPod enthusiast site iLounge.