Some quotes from Twitter in the last few minutes:

rubenerd
I’m relieved of the news and am proud of America for their decision. Kudos my friends.
redragon
@rubenerd Obama w!
joelhousman
Yes. We. Did.
stevenfry
Oh hurrah! My American friends have just texted me the news!!! Good old America, good old Americans! xxx
javajive
Being an American overseas for 6 1/2 years, this is one of the proudest moments I’ve had of my country – finally. Congratulations.
jjprojects
Bush just became history, oh yeah. George who?
rickfu
WE DID IT! Just took a shot to celebrate…all of us with tears in our eyes
nedwin
Awesome.
toddtyrtle
Happily speechless…
mikurubeam
YAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAY
rberger
Let’s hope this is the major turning point for the US and the beginning of a long positive transformation to a sustainable, peaceful future.
springnet
The United States just began to look very different to the rest of the planet.
alexlindsay
It will be really great to have a president who can speak in whole sentences and not like everything’s a question.