This thread on gwonline has links to a bunch new Nightfall screen shots.
More screens found here and here.
And some notes on Nightfall from Live from Leipzig thread:
PcGames.de now released another article to Nightfall:
- the motto is: More PvE than in Factions
- but there will be new arenas/guild halls
- also pcgames talks about dungeons
- traps are: things crashing down, poisonthrower (whatever that is), spring gun
(they make you blind (not the condition, but your screen) and nebulize (right word?) your view
- Also a example for a puzzle: You have to collect stone tablets and insert them in a pedestial, but there is a ghost who steals them as soon as they’re in the pedestial. Also the solution is given, but I wont tell it 
- they saw a jungle-area and a temple
- waterfalls are looking more realistic now
- those customizable npcs are the henchies if I unterstand the article correctly. In a few missions you have to make decisions which affect the variety of available npcs
- updates to the interface
- better group searching – its planned to search in other districts too
- skill templates can be saved (wooohooo!)
www.guild-wars.info (GER) released another article:
(Source: http://gw.onlinewelten.com/articles,…_gc_games.html )
- they talk about traps/puzzles
- they asked for the bonus missions, but haven’t recieved an exact answer (but they [ANET] know we like bonus missions)
- dervish got nerfed a bit (oh noes
)
- they know that balancing is hard, but ncsoft is confident they’ll make it because the game was designed to last 5-7 years (or even more)
- also the players has to be able to overwatch the whole skills/classes
- the amount of content is pretty equal to factions
- nothing new about game mechanics like alliance battles (ncsoft-member didn’t answer ^^)
- minor interface upgrades and dmg/energy/heal-numbers pop up a bit different
- also the graphics got a bit polished
- they think about how they can make the “auction houses” secure to avoid any abuse
- the worker wasn’t sure about further weekend-events, they were here to motivate the players for nightfall
- they also think about merchandise products, but thats gonna take some time
- in a few hours (16:00 GMT+1) there’s gonna be a press conference
- they (g-w.info) expect a release date at the conference