AppleInsider claims that iPod retailers are starting to get signals of an impending iPod refresh.
Target's iPod inventory has reportedly had a change in status from "Active" to "Discontinued" while UK retailer Argos is prepping to clear out their current iPod inventory in anticipation of the updates:
A person familiar with the plans says the company recently took receipt of new point-of-sale displays promoting "price cuts" that should hit the retail floor during the last week of August or first week of September.
Apple is widely expected to release new iPods in September. Rumors have pointed to a new iPod Touch and iPod nano redesign.
http://www.appleinsider.com/articles/08/08/20/retail_sources_say_its_closing_time_for_current_ipod_line.html