If you’re not an Ubuntu member, you can’t get your blog fed into planet.ubuntu.com. However, just because you’re a user doesn’t mean you can’t help spread the word.
Check out Planet Ubuntu Users and see if it’s something you’d be interested in. A blog submission form is here. Thanks — again — to Bapoumba for pointing it out. 😉
Motho ke motho ka botho 
Hello K.Mandla, you’re very welcome.
This planet for users really is a good idea. Thanks to Carthrik and Tiago for making this happen.