By popular demand, here's how I did it:
Go to bloglines. On the opening page after you've loaded your feeds down the left hand side, but before you've called up a blog on the right, there's that long list of things you can do with bloglines. Go down to 'publish, share and save' at the bottom, and click on 'share your blogroll'. In the space provided, type the name of the bloglines folder you want to share, then let it generate the html. You want to then copy the one that starts <script...
Now go to typepad. I found it easier to delete the whole typelist I was replacing. Create a new list with the name you want. Make it a 'links' list. Click on the button to add your first link. Don't put anything in the 'name' and 'url' space, but in the 'notes' space paste the <script... thing you copied from bloglines. Click to add the link. Typepad will then ask you if you want to display the list on your blog, say yes.
Then go back to the main list of typelists, and click on 'configure' for the one you've just made. Scroll down to the bottom of the page, and click 'display notes as text'. Magic! Your bloglines feeds are now displayed. Repeat as necessary for other bloglines folders - you will want to create a separate typelist for each. Or you can share all of them in one go by just 'exporting' your bloglines (link at the bottom of the bloglines column which has all your feeds in it) - but then you don't get any categories in what you show on typepad.
Contrary to what I wrote the other day, bloglines seems to be clever enough not to display password protected blogs on this list, so that adds a level of privacy for those who want it.
There you go, hope it works!