I think Yammer takes first place. It's required reading at work (the main feed). It loads incredibly slowly (I think it's like 5 redirects for auth and whatnot)

I think Yammer takes first place. It's required reading at work (the main feed). It loads incredibly slowly (I think it's like 5 redirects for auth and whatnot) and the default "What's new" view is entirely useless. Jira and Confluence are excruciatingly slow, too, but at least the information isn't hidden behind useless feeds.