There was a brief mention in the Magical Margeritas trip report/blog, but not that many people seem to have noticed otherwise.
There will be no flights at all in or out of Greece tomorrow, Sunday 9th, or Monday 10th. Flights due to leave from Rhodes Airport after about 10pm tonight are also cancelled or have been retimed to leave earlier.
This is because the union covering the Greek Air Traffic Controllers has called two 48 hour strikes, one on the 9th and 10th, and the other on the 12th and 13th. So exactly the same thing is likely to happen again on Wednesday and Thursday unless the dispute is resolved. As the controllers appear to object to a new law which has already been voted through by the Greek parliament, there's little hope of any resolution.
So the same situation will apply - flights on Tuesday due to arrive Rhodes after 9.30pm, or depart Rhodes after about 10pm will be retimed or cancelled, and almost certainly there will be no planes at all on Wednesday or Thursday.
People already on Symi need to keep in close touch with their airline (or package holiday company, should they have arrived that way) as if they were due to fly home on Sunday, Monday, Wednesday or Thursday they need to find out what days they can/will be moved to. People due to fly home on Tuesday need to be aware that flights may be retimed to depart earlier, and ferry options that day are limited.
Those flying out from their home countries in the next five days also need to keep a close eye on what is happening. Some flights will be rescheduled to different dates, others will be cancelled altogether with an option to rebook free on another date, or take a refund.