A friend recently introduced me to Tumblr.. It's kind of like Twitter, but without the 140 character limit, and you can also post videos/photos etc.
As my preferred *.tumblr.com domain name had already been taken, I decided to point my account at my own *.123and6.com domain.
This can be done fairly easily.
From your Tumblr dashboard, select Customize for the blog that you'd like to edit.
In the top-left, select 'Info'
At the bottom of that drop-down, select 'Use a custom domain name', and enter your chosen domain.
Now, you just need to create an A record on your DNS server to point to Tumblr's 188.8.131.52 IP address.
And Bob's your uncle.
P.S. If I get round to it, i'll add screenshots and detail how to set up the A record for GoDaddy hosted domains.