We can import blog postings, comments, and (usually) images from WordPress, Blogger, Moveable Type, Live Journal, and others. Just log into your existing blog, export the posts you want to keep, and then open a technical support request with us by emailing it to firstname.lastname@example.org. We'll do our best to import what you have into your IndieMade site.
If you use a different blogging system, you may still be in luck, as the WordPress format is rapidly becoming the lingua franca of the blogging world. Just poke around and see if you can find a way to export to that format. We'll help you if we can.