22-year old David Karp may not yet have the profile of web 2.0 celebrities such as Biz Stone or Kevin Rose, but his keynote at Auckland’s Web09 suggests that it may only be a matter of time. His high speed, high impact talk about what he has learned running mashup blog platform Tumblr – established in 2007 and currently with close to 1 million publishers on it – was well worth the price of the conference ticket. … »