Migrating a Typepad Blog to WordPress

I will be migrating a blog from TypePad to WordPress and have seen that this can be difficult with broken links, etc.

What is the best practice for this? The website is going to be on a Multisite install and several of the categories are going to become new subdomains. (ex. news.example.com and alumni.example.com)

Has WPMUdev written an article on this?