CyanogenMod has released a custom ROM with a lockscreen gesture feature courtesy of mtwebster. A version of this ROM is now available for the original DROID.
Gestures is the ability to “draw” out anything you wish onto your lock screen which will then launch an application or phone activity that is associated with that drawing, similar to Google’s Gesture Search app.
For now, only DROID users can try out this custom ROM, but there will be more devices supported soon. Click the CyanogenMod source link if you want to check out this ROM!