This is possibly a question that can be answered in a number of forums on here but hopefully this is the most relevant.. if a mod can move this to somewhere more suitable then please do so :)
I'm using the Helm frontend to manage my hosting and have a number of duplicate domains to set up (by duplicate, I mean the same domain name, just a different TLD).
Within my Helm set up, I have the option to create domains as an alias of an existing domain.
That is, domain.com is created with all FTP, POP3, etc settings.
domain.co.uk, domain.eu and domain.net can all be aliases of domain.com and inherit all the email addresses, server paths, etc.
This is great from a usability point of view in that I don't have to worry about visitors typing in .co.uk instead of .com and ending up at a holding page or redirected back to the .com homepage.
However, I'm guessing search engines don't appreciate this and flag the domain as duplicating content etc.
Would I be best then to just register all the other domains and 301 them to the .com?