I wanted to enjoy some awesome pins on Pinterest and was not able to access it. I thought something was wrong with my internet connection. My ISP had already blocked YouTube and couple of other sites, so I thought Pinterest is now on their list too. I tweeted (01:56 GMT+0500) asking twitter users whether their Pinterest is down or it is only mine and found pinterest is really having downtime. After posting tweet I visited #Pinterest hashtag page where I found flood of tweets about this.
There are lots of tweets saying it is down, so I am little bit relaxed (because my ISP didn't block it :-D).
Update (02:39 GMT+0500): Working now.