The Curiosity rover has an official twitter account: @MarsCuriosity. And this is what it said about the landing:

# I’m safely on the surface of Mars. GALE CRATER I AM IN YOU!!!

And then

# Me & My Shadow… & Mount Sharp. My view of the 3-mile-high mountain in the middle of Mars’ Gale crater #MSL http://twitpic.com/agc3nk

Sara Winge ‏@sarawinge

# In the early days of the web, people had a hard time believing they were looking at a page from Australia. Now, Mars.

Chris Stedman @ChrisDStedman

# MT @bluemilker: In case you wondered if ppl wld show up in Times Sq @ 1am on a Sun. night to watch a robot land on Mars

Alex Ogle ‏@Alex_Ogle

# Get a sense of how big Curiosity is compared to previous rovers http://i.imgur.com/FdzQB.jpg

Tom Scott ‏@tomscott

# Humanity just dropped a NUCLEAR-POWERED CAR, intact, onto ANOTHER PLANET with a SKY CRANE and it’s SENDING US STUFF. BRING IT ON UNIVERSE.

Jonathan H. Wage ‏@jwage

# Imagine what @nasa could do with our military budget. We’d be drinking margaritas on mars by now /cc @BarackObama

Jonathan Green ‏@GreenJ

# if a single cat was the last life on mars, then it might have been hit by Curiosity. maybe. i guess we’ll never know.

HAL 9000 ‏@HAL9000_

# Exactly 67 years after dropping a nuclear powered device on Hiroshima, America drops nuclear powered device on Mars #Curiosity

Yevgeniy Brikman ‏@brikis98

# The Curiosity Rover, brought to you by 2.5 million lines of C code: http://programmers.stackexchange.com/questions/159637/what-is-the-mars-curiosity-rovers-software-built-in

Scott Hanselman @shanselman

# NBC Olympic Tape Delay – 10+ Hours NASA Tape Delay – 15 minutes FROM FREAKING MARS /ht @RichardWest

Ben Dolman ‏@bdolman

# Gold medal for NASA in the 563 billion meters

Chris Neale ‏@onion2k

# NASA’s Curiosity has cost about 1/6 what the Olympics has officially cost. We could have sent 6 rovers and raced them!

And if you think iPhone is just for us earthlings… think again: