After many Google searches and a few forum posts i got the easiest way to find out all the databases names used by the current sharepoint farm..
Central Admin >> OPERATIONS >> PERFORM A BACKUP (which takes you to “/_admin/Backup.aspx”)
This page provides you a list of all items that are (or should be) backed up by MOSS. Lo and behold, there are ALL the databases listed! Alas, it also lists other things than the DBs, but it’s nice enough to tell you what each item is