I send some of my feeds to Jaiku but don't see a lot of activity, is there an edtech group busily working there?

I like Jaiku also.

Nah, not EdTech for the most part. But it's huge in Europe. There was one educator I wanted to catch up to that's only on there.

Also, Nokia has a huge presence on there.

Jaiku was the first microblog I abandoned Twitter for. Alas, My PLN did not join me so I came crawling back.

Jaiku was the first to offer groups and commenting. It's ashame it didn't get as much attention as I thought it should.

LoL

I'm not recommending it per se, I just found a need for it after several months of never going near it.