[UPDATE: The ban has been lifted. Still didn't make any sense].
It's hard to understand how the current Indian government ban on Blogspot, Typepad, Geocities, and other major web domains can possibly be justified as an anti-terrorism strategy. Apparently some people involved with banned groups like SIMI have been using blogs to communicate, and the government has instructed the nation's ISPs to ban those sites, which host thousands of Indian blogs.
Besides noting that a) the ban won't work, and b) it's a grotesque violation of freedom of speech, I don't really have anything brilliant to add to what others have said here, here, here, or here.
By all indications it's a Department of Communication order, though Shivam Vij failed in his quest to track down anyone in the government who would actually take responsibility for imposing the ban.
Let's hope the groans of several thousand pissed desi bloggers will be enough to get the government to swiftly change its strategy. They could easily contact Blogger (Google) and Typepad to get specific sites and IP addresses blocked; they could also be using information gained from tracking people who may be using these sites to make more arrests of actual terrorists.