If you like living on the brutal, life-altering bleeding edge the same way we do, odds are you've got iPhone OS 4 beta 3
installed on that 3GS of yours -- assuming you have an iPhone 3GS, naturally. That also means that you'll likely be interested to hear that beta 4 is now out and ready for you to download, install, and not
brick your phone if everything goes according to plan, just as long as you've got access to an Apple iPhone Developer Program account. Go forth, intrepid readers -- and do report back on your exploits, won't you?
[Thanks to everyone who sent this in]