I got my own domain igorminar.com and changed the blogger.com settings so that the domain name blog.igorminar.com is being used instead of net3x.blogspot.com.
Except for a small hick-up with DNS cache and a weird 404 Server not Found error (described in this blog post) everything went smoothly. My plan is to keep on using Blogger's custom domain feature for a few weeks and then migrate all the content over to my own blogging engine. I'll most likely end up using Mephisto, JRuby, Glassfish and MySQL, but things can still change.
The reason why I'm moving in two phases is to keep all the referring links that point to the old urls as well as most of the search engine ranking. The Blogger's custom domain feature now redirects everything to the new urls via 301 Permanent Redirect, so hopefully the transition will be close to painless. I'm not SEO expert, but this for sure is an interesting experiment.
And for those SEO "experts" that were claiming that getting Blogger to do proper redirects after a blog move was impossible here is a little proof:
$ wget --spider net3x.blogspot.com --16:34:30-- http://net3x.blogspot.com/ => `index.html.2' Resolving net3x.blogspot.com... 18.104.22.168 Connecting to net3x.blogspot.com|22.214.171.124|:80... connected. HTTP request sent, awaiting response... 301 Moved Permanently Location: http://blog.igorminar.com/ [following] --16:34:30-- http://blog.igorminar.com/ => `index.html.2' Resolving blog.igorminar.com... 126.96.36.199 Connecting to blog.igorminar.com|188.8.131.52|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 0 [text/html] 200 OK