Thanks to Blizzard's decision to merge +heal and +dmg, A Healing Druid’s Naxx-25 Shopping List at World of Matticus actually gives something of a start of the gearing endgame.
Of course I'm months from being high enough level to be months from finding and DKPing with a guild before I'd even need to consider reading this, but wanting to read it? Pretty neat. Found via Rolling Hots via Daily Druid.
The portion "Syd’s Gear Theory" is probably more useful (from the same Matticus post, lower down) for general DKP guild advice.