As seen in my blog post... We now support custom domains for Geekzone Blogs. The first ones using it are and

To use it you need your Geekzone Blog active, and update DNS to point a DNS A record to our server. We then load the domain name in the Blog configuration and all happens automatically.

If you have previously posted in your Geekzone Blog, then all entries automatically redirect to the new address, and are still visible. This means you won't lose any search traffic.

A sitemap is automatically created if you want to submit to search engines.