Google Alerts is the subscription based search interface for Google. 
You can search "Everything" (everything that Google indexes) or you can target by the type of site:
For SocialMiner, you will want to select the "Deliver to Feed" option.
- Google Alerts is "beta" and while it seems to work great for blogs and forums the "Realtime" produces a subset of the results for Twitter Search.
- Typically you will want to create a feed for each type of site as you likely want treat these various types of sites differently. For example, you most likely have different tags, campaigns, service level goals and business objectives for blogs vs realtime. However if you have a very low volume query and you are curious about all results on the Internet then choosing Everything is a simple approach.