A proof of concept virus effecting OpenOffice an StarOffice has been
created. The virus is apparently purely proof of concept and has no
harmful intent, it simply loads a picture from the internet. Macro
viruses have become much less common than in previous years, however
there has been a recent case of a trojan attacking via a flaw in
Microsoft Word (http://www.securityfocus.com/brief/213).
This proof of concept virus is the most recent of quite a few which have
targeted Linux and Mac OS X
these platforms had been considered as pretty safe from the evil virus
writers who concentrated their efforts on Windows (an easy target). As
more users move to these other platforms, it's only natural that virus
writers will start to shift their efforts.
As previously discussed
there are many good anti-virus engines available for these platforms so
there's no need to go without protection.