On the heels of Apple’s Sept. 9 Rock and Roll event, we decided to analyze conversation share around some of the big announcements.

The Nano made big news at the event with the announcement of its new built in camera, 2.2-inch display, Genius mix capability and built-in FM radio.

The iPod Classic increased capacity to 160GB while keeping the price the same at $249.

The iPod Touch was advertised as the most affordable gateway to the App Store at $229, with no monthly fees. The keynote called the Touch Apple’s fastest growing product line and highlighted its gaming and pocket computing capability.

Apple also highlighted iTunes 9, which includes Genius mixes, home sharing, iTunes LP and a redesigned store layout.

We used Social Radar to measure share of voice for the following words within coversations about “iPod” within the last month: Touch, Nano, Classic, Shuffle, iPhone, Zune and iTunes.

Conversation around Nano spiked dramatically following the announcements, but Touch still holds the highest share among iPod conversations online.

iPhone and Touch hold the largest percentage of posts within the last 30 days at approximately 30% each, with Nano and iTunes each under 10%.