Herbalism 300 - 375

Just threw this together really quickly, if it''s of use to anyone I''m glad, if it''s not then just ignore it.

300-330 (or 345 if you so choose) - Felwood

I know you were all probably hoping for something a lot more exotic and in the outlands, but Felwood really is the place to go if your looking at it purely from a levelling perspective. Due to the hit of TBC there''s virtually nobody farming herbs here and you get the bonus of Whipper Roots etc. which while out dated, still aren''t on the same timer as pots, so if your a raider they can save your ass.
I generally start at the alliance flight path, going up round the Furblog village before following the perimeter south. I''ve included a map for anyone unsure of a route to go.

http://img220.imageshack.us/img220/4495/felwoodherbrouteba2.jpg

Pick absolutely everything that is even green to you. Plaguebloom, Dreamfoil and Mountain Silversage give about a level each bush until 330, and whilst the plague that is Sungrass, Arthas'' Tears and Purple Lotus are green, they still give a level fairly consistently so it''s definitely worth picking them. If memory serves somewhere around 340 Plaguebloom goes green, and you start to get levels less consistently, however you may choose to stay on, especially if you don''t have an epic flying mount, for the densely packed herbs, and low demand by pickers, all the time remembering that Golden Sansam, Mountain Silversage and Dreamfoil still sell very well on most servers.

330 (or 345) - 350+ - Zangarmarsh

Zangarmarsh is simply packed with herbs, all of which are useful. My favourite are is the North-West corner, being packed with herbs and Bog Lords / Giants which can be herbalised (If that''s even a word) once looted. I tend to zigzag across it, before moving to the start to do the same, however on more populated servers you may have someone else doing the same, so extending your route to sweep up from the south-west and across the northern border can yield great rewards too. Expect lots of Felweed and Ragveil, with the odd Dreamfoil and Dreaming Glory.

http://img86.imageshack.us/img86/6729/zangarherbroutevk2.jpg

I''ve included a map despite this route being fairly self-explanatory as with the last one.
Once you hit 350 the world is your oyster really. I chose to continue my Zangarmarsh route all the way up to level 375, but it is equally viable to move on to Shadowmoon or elsewhere.