There are many services that you could include in your learnstream. Here are some of the basic services to consider for your learnstream. I listed a couple of options for most services (my primary is listed 1st)).
Note: Try selecting a consistent name across services, if possible. You can check your username for many social services at once by using name.chk or knowem.
Basic Learnstream Services
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If you’re not sure where to begin, here’s a suggested order:
3. Google Reader