As noted byThinkSecret, a new Yahoo job posting from Apple bring some further speculation on future iPod capabilities.
The iPod Division is looking for a Graphics Software Engineer to develop graphics and imaging frameworks for future iPod user interfaces. Duties include design and integration of graphics and imaging frameworks in an embedded RTOS environment.
While this may simply be in line with iPod Photo capabilites, Previous job postings had hinted that Apple may be looking into future iPod gaming. Meanwhile, Page 2 Rumors had hinted that Apple is taking gaming more seriously.