sure, I've subleased a bunch. my experience with that is that two kinds of companies generally sublease: places that are growing and will eventually want the space you're occupying for themselves, or places that aren't doing well and will eventually fold. I've subleased from both :).

it's for sure a good option if you want a very short term thing, but it's a tough spot when you probably want > 1 year but 5 is a stretch.