Czech JBoss User Group logos

we would like to ask you to create us some graphics for Czech JBoss User
Group. We already created a temporary logo for the first event but we don't
consider it the best we could have (see attachment)

We would also like to have a coaster (see our preliminary design in
attachment). The silhouette is Brno. Maybe we could demonstrate the Czech's
beer nation on the coasters or even in the logo.

And finally we would need a Twitter icon for the group.