I won't miss you! Finally, with lots of hacking, I managed to move my weblog from the obsolete b2 to WordPress. And this is how I did it:
First, I installed WordPress to /wordpress/, including the usual installation routine, including the population of the tables in the database. Then, I set the table prefix from wp_ to b2, and started wp-admin/import-b2.php. After that, I had to drop the table b2options, and rename the table wp_options to b2options by running "RENAME TABLE wp_options to b2options;". After that, I moved the old /blog/ to /blog.old/, set the weblog URL to http://synflood.at/blog in the WordPress configuration (via the WP web interface), saved that configuration, and moved /wordpress/ to /blog/. Et voila!