Updated “I can tell you that this is the last TechCrunch50,” event co-founder Jason Calacanis told humorist Loren Feldman last night in a video interview. In the spirit of the Internet-startup conference, the news was first reported online by a puppet. Calacanis openly talked about a fight with event co-founder and TechCrunch editor Michael Arrington to some conference attendees last night. He later tweeted to ReadWriteWeb reporter Jolie O’Dell that “ this was the last TechCrunch50 .”