(I've noticed I still get some traffic for this post so I'd just like to refer you to a more up to date post about my dual spec and 3.1 talents.)
I've got a slight variation on 2 builds that I use when healing as a druid at level 80. One is for raid healing and the other for heroics. I'm not a Dreamstate healer or someone who likes to heal a lot with Healing Touch, I like to roll hots and my builds reflect this.
My builds differ by only 4 talent points and those are points that are left when I've got the talents I really want. They can go anywhere really, I choose to spend them like this:
Level 80 raiding resto druid
3 points in Replenish
Well why not, might as well replenish someone even if this talent needs to be improved. Good HPM for a self heal. Reading Phaelias article about this one made me actually consider it. Boss fights in raids tend to last longer than they do in instances so regen becomes more important.
1 point in Natural Perfection
1% crit is never terrible. Chance to trigger Nature's Grace and Living Seed.
Level 80 5 man resto druid
2 points in Nature's Reach
20% more range on Balance spells. Helpful for CC in instances with roots, cyclone and hibernate. You're more likely to use CC as a healer in a 5 man than in a raid at least according to my experiences.
2 points in Improved Tranquility
No threat and 60% cooldown reduction. Makes this a panic option to be used a bit more, nice when it affects the 5 people you want it to affect as well.