The blog is freaking amazing, and we're getting a bunch of info set up there in a much easier-to-track manner then the forums.
There's a lot of things going on in the world around you, all the time - and a million different news sources you could learn things form. With the Main Blog, the campaign is posting news that any given member of the group might be interested in.
It can be anything from "Here's what official news sources say about that major corp facility we blew up" to "Here's the current job and discussion posts other Runners are talking about on Shadowlands".
I'm also going to be tagging characters specifically based on interests. Lotus, for example, is all about celebrity and society news, so I'd tag her for posts about what parties are going on and what bands are going to be in town.
But on the flip side, Genesis is unlikely to read the "Celebrity News Seattle" though.
Anything that I post there are things your character could potentially know about, investigate, whatever. Shadowlands postings are free-for-all, anyone can reply in-character if they're interested in.