and for the people saying "herp derp why no npc's in 1.8 derp herp" this is because the adventure update is such a huge overhaul of the existing minecraft that it has been split into 2 parts 1.8 terrain code change, endermen, the villages, blue spiders, food and xp meter, new combat system and new food and 1.9 will be all the finishing touches to the adventure update
i dont think 1.9 will be the "second" part of the adventureupdate, rather 1.8.x and thats why im guessing that they are thying to save those digits for actual content-additions rather than fixing small bug that cause big commotions.
just saying we might see some small content updates in short periods of time after 1.8 wich will be 1.8.1 trainable skills .2 npc's .3 whatever! etc. etc.
Back in Alpha updates use to get released and they were a buggy mess, after many forum posts and talks from people who have played this game long before most people on this forum I'm sure it was somewhat decided that things would be tested well before being released to reduce the likely hood of MAJOR bugs being put out with the patches. This is something that Notch himself even discussed with us when the subject was brought up. So if that means putting off the release, as saddening as it is I'm all for it. If the team wants to play the game and test it thoroughly and fix anything major before giving it to us that is great and no one should be complaining.
But alas you can't please everyone and someone will always complain about anything just for the sake of complaining.
Take your time Mojang, and this is great news to be coming from Jeb. Keep it up!
2 things said that it will most likely be the 8th in his tweet. And the bar things are probably for the server connection screen. Sorry if someone else already said it but i had to get that out so we can all have our new options and other stuff like better 's and blue :Spider:s and no more from 's