Kathy Sierra has a fantastic satirical post on the Web 2.0 “sharing” (i.e. exhibitionism) phenomenon:

More and more, the Web 2.0 and Blog world feels like a highly-scaleable, web-enabled way to peek into more medicine cabinets. And it’s even sucking the slightly elicit fun out of that now that we’re all encouraged to Share. Where’s the mystery? Where’s the excitement that comes from not knowing everything? Is the (metaphorical) allure of the strip-tease gone forever?

She has a chart comparing Web 2.0 to group therapy that is both hysterically funny and an incisive critique — she’s got us all thoroughly pigeonholed.