How to find iPod/iPad (iOS) apps

Here's a few websites and apps dedicated to app shopping
appshopper  a directory of apps that notifies you of new and free apps
appminer  search free apps
appolicious  in association with Yahoo, you can find new apps based on apps you like
AppZapp guides you through the AppStore and has an alarm function when apps go on sale
Free App Tracker a directory of free apps and apps that have recently dropped in price