If you are specc'd for tree of life it is a very good stat because the increase to healing to your group is based on it. For leveling it isn't the primary stat you want on druid gear however. As a secondary stat it can be nice though especially if you are using innervate to limit your down time.

Spirit is actually a good stat for all casters now, for the extra mana regen it offers, however the only healing classes/specs that may wat to use spirti gear and trump the intellect are disc/holy priests and resto druids. The more spirit the merrier for those two classes.

But in all fairness the specs listed were for lack of more detail 'pure specs' which throws out he disc/holy priest.

Because in all honesty a druid can be a truly viable healer in a balance/resto spec that takes the added spell/healing from intellect and the mana reduction of 3 major healing spells from balance and couples those with increased regen and healing from resto and any druid that doesn't have imp MOW is weird.

Jaynitan, unless you know something that I (or wowwiki) don't know, Spirit is still very much a secondary stat for almost every class. There might be a case to be made for arenas where clutch drinks or innervates can win games and a few more points in spirit might be enough to regen to get that extra heal or fireball off. For PvE, however, you will almost never be able to get out of the 5-second rule to actually regen.

Unless you are a Tree Druid, mage with Arcane Meditation, or priest with Spiritual Guidance, spirit will be a nearly worthless stat for you. If I am wrong, then please back up your initial claim with more than your opinion, but spreading false information is bad.