So the multiplicity of Oracle Web2.0 sites is not an automatic good. It will lead to the duplication of effort and a dilution of impact. We went through the same cycle of grief a few years ago with forum sites. On the one hand nobody wants to repeatedly write the same things in several different places. On the other hand people want to participate. And yet if we pour all our efforts into one site and it's not the one everybody else has chosen our endeavours will be wasted. Absence of choice makes life so much easier.
Still, I don't want to be negative about this. So I've set up a group for OTN Forum Regulars on OracleCommunity.net. Perhaps I'll see some of you there.