Can the most high-profile video blog in the U.S. stay popular without cheerful, friendly, smokin' hot host Amanda Congdon? We're about to see — the Rocketboom host informed the world today that producer Andrew Baron let her go. Is this an overdue change, or another sign that vlogging is just lame TV?

The subjects of yesterday's SF Chron story on video blogging come from all over. Some are nearly mainstream, some known only to hundreds. But everyone in the piece falls into one of two major categories: