I don't think anyone has asked for that yet, but I see the value in it.

I think I can pull it off, but only partially. I can watch the blockchain for votes created by people you're following, but getting the history of that would require a ton of bandwidth. I'd have to load every single persons account history that you're following and then aggregate that data together into a stream. Imagine you're following 100 people, that's 100 account histories to load and process.

I'll definitely add this to the feature list though, and I can probably at least make it notify you when one of the people you're following votes. But when you load the page it'd likely be empty with no history. Not ideal! But I'm sure eventually it'll be possible :)