I bought the R1 release from a cutout bin, and only later realized it was in fullscreen. It looks like that was the only R1 release. Is it available anywhere in 1.85:1, which seems to be the ratio of the theatrical release?
Next time you see me, it won't be me
Looks like the Region 2 version is widescreen:
http://www.amazon.com/Screamers-Region-2-Peter-Weller/dp/B00004RYIE
http://www.amazon.com/Screamers-Region-2-Peter-Weller/dp/B00004CYAZ
Since there's a sequel being made, perhaps an anamorphic widescreen edition will be released for Region 1.
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The early bird gets the worm, but the second mouse gets the cheese.