airoli is right, the Commercial court has denied Swissair´s request for an injunction keeping SWISS from using the name. Swissair can still file a regular lawsuit, but the administrator Karl Wüthrich has made it clear that he will only allow such a lawsuit to be filed if the chances for success are good.
You can definitely write off the shares because there´s just not enough assets around to even pay creditors, but there´s one possibility to get something: you could try and file a claim with the administrator for the 5000 miles each shareholder was supposed to get every year. The legal situation about these 5000 miles is not entirely clear, and it sure doesn´t hurt to file a claim. Details how to do that are on the website of the administrator
www.sachwalter-swissair.ch