I really got annoyed with the JRoller interface after they decided to upgrade to a newer version. It was not that user friendly anymore so decided to migrate to wordpress which is much much better. Naturally I wanted to migrate my blog entries from JRoller to wordpress but JRoller doesnt provide any export options. Googling for the topic returned an entry titled JRoller to WordPress migration.
This did the job for me. Very nice post.