Google Mobile launched “Search Options” on Android/iPhone/Palm WebOS devices in US, so that you can slice and dice your mobile search results as well. For e.g., suppose you’re shopping at a store for a camera, and you would like to see what users’ve been saying about a specific model within the past week. You can do this simply by searching for the name of the product. Then, on the search results page, use "Options" to filter by "Forums" and refine further by choosing "Past week". See the screenshots below for a sample query. Try these and other Search Options yourself by simply doing a mobile search on google.com and selecting Options.