Are you getting little jealous of all those Droid users out there? If so, check out this clip. In it, you will learn how to hack your jailbroken iPhone and install an Android style startup screen to take the place of your normal iPhone display. This will give your iPhone an updated look and make it look just like it came off the Android market.
AndroidLock is an amazing tweak from the BigBoss repo in Cydia that allows you to change the usual "Slide to Unlock" to the Android OS lock screen (like that found on the Motorola Droid and T-Mobile G1).