As you might notice, every URL on blogdex is now being rewritten to the new url for Blogdex:
This is due in large part to a kind gift from Jimmy Wales, the former owner, to whom we are extremely thankful.
The reason that blogdex.net was chosen is that MIT has a policy against the use of .com domain names for servers run on the MIT network. This is an informal policy created to uphold the policies on commercial activity at MIT (as noted in Section 13.2.3 of MIT's policies and procedures. It is my opinion that the .com domain does not connote commercial activity anymore, but after bringing this to the attention of the MIT network administrator, I received no response.
If this policy changes, I might switch over to blogdex.com, but for the time being everything will point to blogdex.net. I'm sure most people will be thankful for the change.