In an effort to fulfill a New Year’s resolution, I’ve (hopefully) squashed some bugs and bundled together a release of Photopress. This version works for me with WP 2.0.6. I did have one problem, which I think was related to changing hosts, not Photopress: the collation on one of the tables was different from the other one, breaking the queries. Some clicking around in phpMyAdmin fixed it.
Download it and give it a try (but I’m sure I don’t need to tell you to keep your old files if they’re working for you): photopress.zip or photopress.tar.gz.