Mobile applications help for house hunting.

In this down housing market and with signs of houses for sale popping up everywhere, it would been nice to have a mobile tool pointing you out to properties in the market as you drive by a neighborhood. Well two new applications by Zillow.com and Trulia.com, two online real estate power houses, offer just that with some degrees of usefulness.
One thing that they both do, is to point you to some houses on sale in a chosen neighborhood using the built in phone's GPS. But each of the two applications have its own flaws: they sometimes do not have a house on sale listed in their databases or in the case of Trulia, fail to compile a list of the closest homes for sale in a given neighborhood.
Zillow's application was introduced last month and works only with iPhone, while Trulia's works on more phones and both services are free.