Welcome to the weekly roundup of what’s new and interesting (at least to Dana Hutchins) when in comes to Web marketing, including SEO, mobile, social media, e-mail and other channels.  Short list for the first week as we are just getting this series going.

• Instragram, the photo sharing app, passed Twitter in the number of users, having hit the 300 million member mark.  Now, the question is how do you leverage Instragram?  The NY Times had an interesting article of how small businesses are using Instagram to engage shoppers.
• Google is labeling sites as “Mobile Friendly” when searched from smartphones.  Expect Google to start favoring mobile specific or with “responsive design” in future search results.
• 14 Recent Changes to Twitter, Facebook… which include more search capabilities for Facebook and Twitter, via Scott McKelvey Copywriting.
• Facebook is rolling out “call to action”l buttons for business pages, including “Sign Up,” “Book Now,” and “Contact Us.”  Via Glenn Gabe (@glenngabe).