Just had a look at the Olympiakos squad, and they've got one or two recongisable names.
Didier Domi was at Leeds at Newcastle as a defender, playing nearly 70 games over here.Luciano Galletti has been capped 13 times from Argentina, and is a good midfielder.Darko Kovačević is probably the most well known. He played for Sheff Wednesday for a while, as well as Juve and Lazio, and also was red hot alongside Nihat for Sociedad for a few seasons.Predrag Đorđević is the captain and plays left midfield. He has a scoring record of nearly one in two, so look out for him.Raul Bravo alot of you will know from being at Madrid for a long time.Fernando Belluschi along with Galletti plays in the midfield, again some may know him.Lomana Lua Lua, no description needed really.Antonis Nikopolidis. Finally, legendary Greek 'keeper. Kept goal at Euro 2004. Aged 36, but looks 56. Still a decent keeper though.