Check out this landing predictor. Set launch site, time and date, ascent rate and expected burst altitude and get a prediction on where will the platform/payload land.
http://predict.habhub.org/
Great find Marios, I also found it a couple weeks ago from Slaros' but neglected to post it until I had some more time to check it out. We are getting pretty signicant drifts, and the strong jetstream above Cyprus isn't helping things. But we are working on a solution, will post it soon in Suggestions!
Also, it should be noted that
http://habhub.org/ in general has a ton of tools we will undoubtedly find useful, especially for tracking the balloon.