Do Shamans have a place in end game content?

[Skandranon]

Chain heal still dominates anywhere there is environmental damage, and earth shield is still solid healing that transfers aggro to the tank.

One enhancement shaman is a great addition to a melee DPS group. The buffs more then make up for your lack of damage relative to a rogue. KTM is practically a requirement for that though.

Elemental shaman are tough to fit into a group. (blah blah standard play how you want). To chain cast for any reasonable period of time you need a s-priest, but those groups get very crowded with mages and hunters. IF your goal is DPS in an end game raid, I'd advise against planning on an elemental shaman.

Pretty much spot-on. The only thing I'd add is that Elemental isn't as hard to fit as it seems. A 41+ point elemental shaman with a solid minor in Resto (down to Healing Focus) can be fit into a caster group and make up for the lack of damage gained from shadow priest by laying down Totem of Wrath and Wrath of Air, along with providing key spot heals to casters against environmental damage.

Obviously this is only meaningful where there's significant environmental damage to be taken, and so you can expect that the elemental shaman's ability to swap to healing (unlike Enhancement, since Elemental gear is significantly less gimp for healing than Enhancement gear) will come in handy. Elemental shaman still are not doing competitive raid DPS in real end-game, but their boosts to the rest of the group and flexibility combined with lukewarm damage just make up for it. This is in direct contrast to the Retribution paladin, who sacrifices nearly all of his healing capability for virtually no return (although changes intended to address this are in 2.1.0).