I wrote a column in this week's edition, specifically, about LonelyGirl15, and, generally, about marketing challenges. For more than you could possibly want to know about LonelyGirl, go here.
There are many unknowns about LonelyGirl, most importantly whether the bump from obscurity to YouTube-wide adulation was the result of a calculated, intense PR campaign to get the video in front of eyeballs, or whether it was one of those lightning-in-the-bottle-type things.