Doblin is an "Innovation Strategy" firm headquartered in Chicago. I like their classification of 10 innovation areas and landscapes . They provide areas where companies can innovate and examples in each area (click on each). I like the fact that they talk about innovation not just in product design, or just in premium priced products.
Argue about Google not being on any of the lists or snicker about Martha Stewart considered a channel innovator, but it is, well, an innovative way to look at innovation.
Business Model e.g Businessweek.com
Networks and Alliances - Sara Lee
Enabling Process - Starbucks
Core Processes - Wal-Mart
Product Performance - VW Beetle
Product System - Steelcase
Service - Lenscrafters
Channel - Niketown
Brand - Ben and Jerry's
Customer Experience - Disney Cruises