Special Note: If you are just looking for the Raid Entrance to Firelands, simply go to the portal on the north side of Sulforon Spire in Mount Hyjal. You need to be in a raid to enter here.
Less Special Note: If you've arrived in the Molten Front of the Firelands already, you may want to check out the Firelands Dailies Guide
|Quest board location in Org|
|Quest Board location in Stormwind|
When you finally do get to the dailies in Mount Hyjal, they are located in the area of Hyjal called "Sanctuary of Malorne" in the SW of the map. It looks like you will need to accrue 20 Marks of the World Tree before you can enter Firelands / Molten Front, which will take a few days of running the dailies there. The first day you should be able to accrue 12 marks, and each subsequent day you will get 4 marks. On the third day after you begin the Firelands pre-quest dailies, you will have accumulated 20 marks and will be able to complete the quest that leads to progress into the next phase of the Firelands quest chain. At the end of day 3 after you've done all the dailies in the Firelands and at the Sanctuary of Malorne, you should have 25 marks of the World Tree. Take a look at the Firelands Dailies Guide when you've finally made it. And the World of Warcraft tumbles onward.
So, to summarize your World of Warcraft patch 4.2 Firelands pre-quest experience, the quest that you pick up near the portals can be done without having completed the necessary original quests in Mount Hyjal. However, to ultimately be granted access to the Firelands, you will need the original quest line up to Reclaiming the Regrowth. This will take approximately 84 quests completed in Mount Hyjal (it actually only takes about 3 hours to run through at level 85, so it isn't too daunting).
Once you get to Firelands, Daily quests will open slowly as you collect Mark of the Worldtree currency from the initial daily quests that are available to you. Just like other faction/currency grinds, you will eventually gain access to lots of great gear and toys. The reported difference between the Firelands daily quest grind and previous such grinds is that you will use your currency to open new quest hubs and that you will actually use gold to purchase items when they become available to you. This is a better balance toward allowing players to do what they want after they've completed the initial reputation/mark of the worldtree grind instead of forcing them to run the dailies ad nauseum to continue to accrue the specific currency needed. Though, calculations on message boards and forums are showing that it will take well over a month of daily grinding to gain access to all items offered at the pre-raid vendor level in Firelands.
How to get to Firelands Entrance
Firelands Dailies Guide
Review of Firelands Dailies Plus Some Inspiration
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