How should I link to multinational companies?

How should I link to multinational companies? It’s a question I ask myself every time I write about companies such as Microsoft, Sun, Oracle or IBM. Should I link to their main sites (microsoft.com, sun.com, oracle.com) or their local sites (microsoft.cz, sun.cz, oracle.cz)? I’ve been mulling this over for some time.

Personally, I’d prefer to link to their local sites, the ones for their Czech offices. I haven’t made a list of pros and cons, but landing on a local site feels more natural. Information that hasn’t been localized and links through to the parent site is usually marked. That way readers won’t overlook anything important.