Leather-working pretty good for any leather wearer
engineering for the things you can put on your gear
herbalism for Lifeblood, the self heal (they recently changed this to haste and a small heal)
mining for the toughness
skinning for the crit.
i don't pvp so this might be a little off, but i would personally take skinning and mining to stay alive and kill other players faster
Balance, go with all zee balance thingys.
In general, you will want to gem for Spellpower/Resilience or Spellpower/Stamina in PvP. Spellpower enhances the power of your spells, and the strength of a Druid in PvP is placing HoTs which are instant cast while on the move. Resilience and Stamina will help you survive being targeted longer. Play a few games with such a setup, and feel for yourself whether you get killed too quickly, or need more healing power. Then re-adjust your gems favoring more spellpower or more resilience/stamina depending on this. Gemming may change according to your current gear level as well, so it usually pays to find a more experienced PvP resto Druid on your server and ask him/her for advice on gemming, gearing and playstyle. Check the armories of players with good PvP scores, and see how they gear and gem, or even what team combos they play (if Arena is what you are interested in).
It really depends on your gear, but the most common druid that I've seen that worked well(in pvp) is the windy druid. go to shadowdiablo.com to look through the different clones and try to make your own according to the good builds there.
It depends on your playing style. Many say the Druid Ryan is the worst, yet if you know how to use him you can beat anyone in pvp. Best I can say is to try them all out and find one that works for you.
VCN is Best PVP BG ARENA SERVER
There are many websites and resources that offer instructions on how to setup and install PVP software. The best website to get instructions on installation is the PVP website.
"tree of life" is a healing form that resto druids use.. they shift into it and it increases the healing done, the mana cost of spells and if they have 'improved tree of life' talent it also increases armor contribution from items and increases their spell power even more. Oh btw, it's a talent skill, meaning u wont have it unless u r resto specced. So yea it's a healing form.. imo, a gr8 asset to have around in pve or pvp, and a tuff opponent if u come against in pvp
officion newbie
Sylvanas
Yes, free attacks and spells work well in PVP and PVE. Getting free damage from Omen of Clarity proccing is a a good thing.
Warriors I would think.
Envenom with the build that is in the related links