This is a bit late – it’s all in the mysql database. I can find most of the information under the links table personally, but I’ve not gone beyond that.
I can’t remember specifically but once I did reinstall wordpress and used a fresh database but then imported the links table and feedwordpress had all it’s info there. I say this because at the time I was syndicating over 600 blogs and all I could recover from the database was the links table and I was able to get the site back up in under 2 hours. If the info was elsewhere I’d have spent a LOT more time. But I can’t guarantee it because I didn’t write the plugin and this is all from my experience.
This is a necropost almost but I hope you see it or you’ve figured out your problem.
I am going to have to make an addendum. In doing some work last night I had to import wp_links, wp_term_relationships, wp_term_taxonomy in order to get the Link Category for links. Now – that – the link category is stored in wp_terms.
So in retrospect what I did last night was I imported wp_links and it had all my links but missing link category – I had wp_terms which had the correct link category (Contributors). So in order to sync the two I had to import wp_term_relationships, wp_term_taxonomy.
How I figured this out is I poked around different tables to see how things were put in it and then this handy dandy image helped me find the relationship between links and terms.:
http://codex.wordpress.org/images/9/9e/WP3.0-ERD.png
