1) Twitter has started to email account users when someone retweets your tweets. Assuming you check your email often or get prompted when you get a new email, it makes it a little easier to know when someone has retweeted your work.
3) Who has rights to photos you post on social media? A woman posted a photo of the latest shuttle launch on a social media site. News agencies picked it up and used it but few asked permission. This has opened up the debate of who owns the photos, videos, and anything else you post to social media. You should read the privacy and permissions policies for each social media tool/platform/product you use to know.
5) People often ask me what is the future of social media? Is it a semantic web? Is it mashing up current tools? Is it a new and easy way to measure social media? Yes, Yes and Yes. What are your thoughts on the future of social media in the near and distant future?