interesting stuff Cameron, but I think it is about the quality of the network (i.e. the people) not the tool you use. I have an excellent network on twitter - colleagues (at least half them who I have never met) who offer advice, support and encouragement on my work. This is because there is a body of elearning technologists and academics interesting in teaching and learning online in the twittersphere.

Perhaps you are just too far ahead of the crowd and dont have the right community to talk to yet?