Moodspin, a very eccentric social-networking add-on service has just had its app (link opens in iTunes) approved on the App Store. In case you're unfamiliar with the site, it currently works only on Twitter, and lets you very quickly broadcast how you're feeling to the people who follow you.
But here's the catch: it's not just text, the service goes in and makes small changes to your profile icon, adding that same mood-related emoticon to your photo, which in turn lets others see what you're feeling no matter what you just tweeted.
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