Both Podscope and Podzinger allow you to save RSS feeds of your searches to view when your search term comes up again via a feed reader like Bloglines or Yahoo!'

FORBES: co-founder Sergey Brin

Sign in to save your favorite places and quickly access all your past searches and directions from your computer, right on your phone.

ENGADGET: Google Maps returns to iPhone, gives Apple users turn-by-turn navigation