Well, considering there is no oxygen in space, that probably gives you a clue about how long you'd last.

As far as jet packs, I don't seem to remember all the regular troops in the original trilogy jet boosting all over the forests and deserts.  Might be fun to scatter a single bounty hunter pickup kit randomly on a Tatooine map, however.

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those are the dark troopers or something right? we didnt see them in the movies, but they were around that time.  Oh, and will there be anymore classes? i'd like to see a recon class, one with remote controlled droids and lotsa cool electronics