I found out what wildvines are needed for. There are a bunch of leatherworking quest that requires wildvine and for a reward the NPC would give a leatherworking pattern for each quest. Leatherworkers can basically collect about 20 wildvine and gain approximately 18k exp not to mention the patterns to make all the armors(about 7 in all). Wildvine sells about 1g a piece at AH and it's not a herb so can't be harvested. I have about 8 at the moment. Now I just gotta find a someone that does leatherworking. Edit: I know Redhunt is a leatherworker. Quests can be obtained at level 32 in Feathermoon ( Feralas in Kalimdor).