I’ve worked on numerous social media campaigns for clients including UEFA, Amaseu, Philips, Under Armour and Cherries on Top (cancer foundation).
Twitter, Facebook, YouTube, Tumblr; the whole shebang.
See also: https://twitter.com/UEFAcomDerekB
Every time I cover a match for UEFA I contribute to the global Match Centre blog, for example: The Netherlands v Estonia. All the text there, except the minute-by-minute descriptions, is mine.