I plug the iPhone games I make here, I'll probably move away from Tumblr onto a Wordpress one day, but it does the job at the moment.
I started a blog recently that was a bit more serious than my silly tumblr blog I've had for ages:
General critique/article blog.
I'm was wondering the same about personal content. Anyhoo, I started a webcomic called "To Life And It's Many Lemons." lemoncomics.tumblr.com . Interested in gaining more readers in addition to following those doing their own work. Cheerios!