As we get Raid Finder clarifications and new details, the excitement ramps up for this brand new feature coming in patch 4.3. Raiders and non-raiders alike are clamoring for new ways to experience the high-end, endgame content. Since we also now know the role makeup for the Raid Finder, healers will be in demand as each Raid Finder group will be made up of six healers.
Healing is one of the most stressful jobs in World of Warcraft right now. The logistics for healing have changed dramatically since the Wrath of the Lich King days with a new emphasis on smart healing versus throughput. What that means is you have limited resources and need to make sure you're using them correctly. Healing is probably the most complicated role out there right now, if only because healers have a lot of responsibility. In the Raid Finder, encounter difficulties will be easier than we've seen before, but the fact is that players will still need their health bars above zero in order to beat a fight.
Healer addons can be a divisive topic, so I'm going to stick with the basics for healers in raids. Your own mileage may vary, and you're going to want to try out different setups in order to see what works for you. On the whole, people agree that having some addons to help with healing makes the job that much smoother.