[Social] blog integration

[Itay Neeman]

Do people have any more thoughts on the matter? So far, the main  
points seems to be:

1. We need a way to link pubsub items to other pubsub items (whether  
PEP or vanilla PubSub). This can involve links to nodes on other  
pubsub services as well.

2. It is unclear what the best node topology for a blog is.

Anything I missed? From looking at SIOC, it looks like it might be a  
contender for linking things.

Itay