I found a script to migrate from B2evolution to Wordpress here but it was for older versions of both pieces of software. It also didn’t transfer any of the comments. So, I updated it to allow migration from B2evolution version 0.9.0.12 to Wordpress 2.02. You can download the script here. Just rename it to migrate.php and run it on your server after filling out your database connection information and everything should be peachy.