It's called QuickerReply (after LJ's QuickReply) and I am in luuuuuurve. No more losing my place on my dwircle or opening up a second tab. I've already commented three times as much as I usually do catching up on the circle today because it's so easy.
Hmm, but in order to read the comments, I still have to come back here to the old screen. I think I'd like the new thing even better if I could expand and collapse comments right from the reading page.
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