We recently returned from our first trip to South by Southwest Interactive. It lived up to expectations - overwhelming, exciting, eye opening, exhausting and full of amazing people and ideas would all be suitable descriptors of the event.   It's near impossible to summarise the key themes from SXSW as there were thousands of speakers covering topics as diverse as government, entrepreneurialism, startups, culture, entertainment, social media, mobile, retail, gaming, science, space, health and medicine to name a few. The wealth and diversity of content there was literally mind blowing.