Many questhelpers are now becoming compatible with patch 3.1.1.
Nowadays, using a quest helper to guide you through the quests is very common. People get tired of their old char and want to level up a new one, but who wants to spend ages leveling a new toon from 1-80?
Sure you can spend loads of money on a powerlevel service and risk getting banned from Blizzard but many prefer using a quest helper, since it is an easy way to level up quickly and it works really well. Just be aware that Blizzard are coming down on people using addons that include in game advertising so make sure you choose the right kind of quest helpers.
However, it can be a bit of a no brainer, just following the arrow accepting and following the quests without having to think. For newbies I recommend at least reading the quest text in order to get a bit of the storyline.
There are several free WotLK quest helping addons in development, but be careful where you download them because several has reported to contain trojans or account stealing functions. An example of a free wotlk quest helper is the one made by ZorbaThut and his team.
However, if you want to be 100% sure to get a professional developed, tested and trojan/advertisement free Wotlk Quest helper that works for the latest wow patch 3.1.1, I recommend taking a look at Zygor Guides. I’ve personally tried quite a few of these in-game quest helpers and I must tell you that Zygor offer the most stable and easy to use experience for people in need of ultra high speed leveling.
Just remember to enjoy the wotlk storyline and don’t stare yourself blind on the leveling urge.