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The site has been back up and running for a while. Maybe you need to clear your cache. 

We're not aware of any problems with serving images, but it sounds like your computer is having a hard time resolving the i.imgur.com<http://i.imgur.com/> domain. Can you try changing your DNS settings to use either Google's Public DNS or Open DNS? More information on that can be found here: http://code.google.com/speed/public-dns/ and https://store.opendns.com/get/basic 

Try clearing your browser's cache and reloading the page.
You just need to write it at the beginning of the sentence and it will automatically turn into a link. 
Try clearing your browser's cache. We are not under maintenance.