[sapphirecat]

It does, but then it downloads some CD-sized thing, which you can cancel at any point.

I have clicked update once. After slowly fetching the update, the download was corrupt, and iTunes wanted to pull the entire thing down again. Slowly, of course. So I canceled, and haven't accepted any updates since, but iOS 5 might be worth trying again.

[jackvalentine]

iOS5 will be worth trying again if only for the reason that it (finally) brings incremental updates. No more 900mb beasts, after the initial update.