The script co-ordinator, Gregg Nations, has stated that Radzinski is definitely dead, and from the fact that the Eyepatch dude is being played by a different actor than who played Kelvin Inman, I'd say that the Eyepatch dude is someone else.

However, it is clear from the hi-res screenshots that are circulating the web that whoever Eyepatch dude is, he occupies a Station and is possibly affiliated with the Dharma Initiative (since he is wearing a Dharma Initiative jumpsuit).

Evidence -

Eyepatch Man - The Fuselage
http://img174.imageshack.us/img174/2...ngcap10nt2.jpg
(Proof that Eyepatch man is played by Andrew Divoff, and therefore not the actor who played K. Inman)


(Note the top of the Dharma logo on the man's clothing)


I've heard rumors that it is Alvar Hanso, but I'm skeptical of that.