Even after government insisted that there should not be blanket ban on sites, airtel has blocked Vimeo videos. The Vimeo site (and videos) are accessible, but you are greeted with following message while watching the embedded videos (example: our earlier coverage of Little Bangalore video).
Do let us know if you are facing similar issues with other ISPs.
Two days back, there were reports of Sify and Tata Photon blocking WordPress.com. While some of the WordPress bloggers were unable to log in to WordPress, those who manage to log in were unable to update their pages.
Airtel (and other ISPs) earlier blocked Vimeo and few other video sites like Dailymotion after Bombay HC passed John Doe order for the movie Gangs of Wasseypur.