It would be great if QuestHelper was revived, but if it isn't, Carbonite provides an interesting alternative and is being updated for 4.01. According to their forums, a beta update will be online tonight.
The original authour of QuestHelper has taken up the challenge and is working on Questhelper2 (it's in the CurseForge if you're interested or want to give him a thumbs up).
Smariot did a nice job with the original QH, so if you like it, be sure to encourage him over on his http://CurseForge.Com page. Hopefully with the Blizzard additions, it will be possible to do roughly the same thing, with much less new code required.
Personally, have not had a use for it, but can see why some would like it, so go get encouraging!
I can not only see, but experienced it first-hand. Questing without QH is least enjoyable, and in party - extremely frustrating and time-consuming. Wish the author can get the binding of QH routing automat to the Blizzard objectives tracker... will watch the project!
EDIT: Erm... wish I could... Same shit as wowace: "there was a problem with cookies". Anyone can suggest a contact about this issue?