Someone could have dined well on my dime by wagering me on the proposition that this now-renowned "ObamaGirl" video would be -- well -- renowned.

I guess I'm a fogey. When I saw this thing Thursday morning it registered a big "meh." Three days later, the needle hasn't budged.

Actually, the citizen media that caught my eye that day came via the UK-based nfp2.0 blog -- a spot of guerrilla marketing.

[I know you want the SILF t-shirt]

This charismatic piece hit me as an interesting juxtaposition to last summer's viral-marketing Hindenberg, the Agency.com Subway pitch which went viral for its cover-your-eyes awfulness.

(All the original's video links seem to be pulled, but the below is the piece plus smartass subtitling.)

Despite my mixed reactions, and despite the contrasting purposes at play, there's a kinship between the first two of these videos that's wanting in the third. What is this quicksilver "genuineness" that decodes a piece's meaning and foretells its prospects as citizen media?