How can I change the name of my blog in blogspot?

All you need to do, as I just did, is the following:

1. Login to your Blog, go to Dashboard
2. Click on Settings for the blog
3. Go to the tab (at the top) called Publishing
4. Change the name of your blog (subject to availability)

If you have put stuff like Google Friend Connect on your site, a few reconfigurations will be required. You will get the following error "This gadget is configured incorrectly. Webmaster hint: Please ensure that "Friend Connect Settings - Home URL" matches the URL of this site."

To get rid of this problem, you will have to go to http://www.google.com/friendconnect, and then click on Site Settings in the left menu, and then change the name of the Home URL to the new name, and then save changes.

Similarly, for Google SMS Channels as well, you would have to change the blog name in the SMS Channel under http://labs.google.co.in/smschannels.