Google has announced they have expanded Google Product Search for mobile to both Palm Pre and any mobile device with an internet connection based in the US, UK, Germany and South Korea.
To access Google Product Search on your mobile device, just visit google.com and click on shopping or go directly to www.google.com/m/products.
Google also added Google Suggest for iPhone and Android users. Here is a picture of how it looks on the iPhone:
Google has also posted a webmaster video on frequently asked questions on products via Google base, here it is: