Tonic.com has acquired iPhone application DoGood from Ann Arbor, Michigan mobile firm Mobil33t.  DoGood [iTunes link] is a Lifestyle iPhone and iPod Touch application that suggests users to do a specific good deed that the the application says for the day.  Mobil33t used social media resources on Facebook and Twitter to give the application publicity and gain awareness about their cause.  The crowdsourcing around the Twitter hashtag #DoGood helped virally market the application too.  After you complete the good deed suggested by DoGood, simply press done.  Mobil33t worked with the University of Michigan student organization DoRAK (Do Random Acts of Kindness) on the application.