Thanks to Josh from lostspoilers.org for the following.
Just wanted to let you know that there is a going to be a Hungarian guy named Zoltán Fekete (I can't seem to find him on IMDb, wonder why. LOL) on Lost. I'm not sure it's even worth posting, but it's a big deal here. He said he'll be in two "parts" which could either mean scenes or episodes (I'm leaning towards scenes) and that he'll be portraying a doctor passing by Jack, talking on the phone, in the hall. That's pretty much it.
Here's the official video report - It might be interesting to post, because he show the camera people the hallway he films in:
(They talk about Lost at the end, before that is a bunch of stuff about him surfing in Hawaii.)
Source: Lost Spoilers