1. Robert Scoble (http://scobleizer.com)
A former Microsoft suit and perennial Valleywag whipping boy, Scoble excels at saying nothing about absolutely everything. (Typical headline: "RSS: interesting or boring?") These days he mostly just plugs his Web host employer Rackspace and interviews a stream of utterly random Web execs, but he can still get his dander up over the most banal of tech topics. (Please don't get him started on what he thinks about FriendFeed!) Scoble and his camera crew have long been a staple at even the most minor of high-tech events; and at the approach of this entourage, most people scurry for the bar or the buffet.
2. Michael Arrington (http://www.techcrunch.com/)
Arrington built a veritable empire by tirelessly blogging about Silicon Valley--often breaking news that no one else had and covering companies that no one else would touch. Now the rest of the tech blogosphere chases after him. Arrington isn't happy with the size of his kingdom, however; and when public attention starts to dissipate, he's happy to stir the pot with one wild story or another. Last January he went into self-imposed exile, citing concerns over people spitting in his face and a newfound fear of death threats. The previous summer, Arrington blogged, he had received death threats from a man with a felony record and a gun. The incident forced Arrington to hide out at his parents' house for a week.
Then, last month, after the hideaway hubbub had faded, a British court found him guilty of libel and "sustained character assassination," all but banishing him from the shores of England lest he be arrested at the airport. (In fairness to Arrington, he refused to defend himself against the charges.) The upshot is that his future exile options have diminished.