Migrating users from .com to .org?

I am in the process of migrating my blog from my wordpress.com address to a self-hosting (wordpress v3.1.2) address.

Blog has migrated across nicely.

Appears my users have also migrated across, but they cannot login with there old credentials (which are tied to wordpress.com, right)?

I have around 30 users, and I would like to minimise the amoutn of work they have to do, to re-register to get access to the wp-admin console.

What is the best way to keep the new users, but perhaps reset all there password to ‘password’?

I don’t know if you can see the email addresss of your users in wordpress.com blog as i never used it. If you can, as you have not too many users you may try to add them manually from wordpress dashboard and send them an email with the password if you have access to the email address.