Yahoo has just released a mobile version of Yahoo Shopping. Details and instructions here.
The mobile version of Yahoo Shopping will work on mobile phones/devices with a WAP 2.0 enabled browser that has access to one of the following networks: CingularOrange, CingularBlue (formerly AT&T Wireless), Verizon, Sprint, Nextel, and TMobile.
Along with the new (beta) mobile version Yahoo Shopping, the folks in Sunnyvale have also added a feature to the web version of Yahoo Shopping that allows the searcher to send product info directly to their phone (via SMS, text message). Look for the "Send to Phone" link on "product pages." Yahoo also offers the send-to-phone feature for Yahoo Maps and Yahoo Local.