Great post Dave, glad to see you are pushing that out that new branded search tool to all your buyers and sellers!
Searching with an iPhone for real estate listings in Sonoma County just got personal for me. My IDX vendor, IDXBroker, has released an iPhone app that lets me have my own self-branded iPhone app to search Sonoma real estate listings.
I've always been happy with my IDX vendor's great service but now they have provided me the bragging rights to share my own iPhone app with my clients. According to some of the reviews of this application, clients are happy that the listings are live and local. They compared this very favorably to the Trulia and Zillow applications which don't always have the most current data.
According to market statistics nearly half of all Internet mobile real estate searching is on the iPhone, so whether you have one or not, a lot of your clients might.