Bioshock recently got its very first patch. What pressing technical issues were addressed in the update? Irrational says:

Update improves stability when loading autosaves and overall Game stability, corrects audio during title menu loading, and addresses AI behaviors regarding use of health stations.

I didn't notice any of these issues when I played through the game, but hey - I've got no problem with a publisher polishing a game up a bit post-release. It's nice when they like their game enough to put more work into it rather than just swimming in their new money-pool.