elWN have now implemented a formal review process and, apparently, have all the requisite modules in-place to get listed in Google News.
The bugs related to this for enWN were: 30621, 20818, 20919 and 21919.
The first of these was, IIRC, the key one to resolve things for this. However, I recall seeing an issue a few months later with GNews spidering, and listing, articles not in the news feed in some circumstances. I ended up emailing someone at Google (don't ask who, those emails are on another machine ... somewhere).
Thus, once the Greek Wikinews config matches that of enWN, Google either need alerted to such via the Webmaster tools account, or someone needs to drop them a note saying we've another language edition now carrying out an independent pre-publication review process.
elWN could also do with a little help porting the EasyPeerReview gadget over from English Wikinews. If someone can help them with that, I'm sure they'd be most grateful.