Has there been any blue confirmation about this? Attunements are good thing, but not that good thing when u have to do it again, but if that's account bound it will bring back the epicness when u have to "earn" the spot.

There has been no word about account wide attunements, but at this time we've not fully decided on the path we'll take in Cataclysm regarding attunements. There could well be some minor attunement criteria for some Cataclysm raids, or even some of the heroic dungeons, but nothing concrete yet.

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Q u o t e:
It's also nice if people actually get to see the instance portal and meeting stones again, just to remind them WHERE they're getting their epic loot from!

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That's the other point - in order to be able to use the LFD tool to visit a dungeon, one must have already uncovered the instance on the map.