oh the little sleeve the BB shipped with? i never used it.. i used a holster that had a magnet in it though, and it worked really well. i doubt the droid(s) will ship with a blackberry-esque sleeve though because i don't know of many people that really used them. it will probably just be a feature for docking purposes.
also, do we know that the magnet is used to HOLD the droid in the dock?? i would think it is only used as a trigger.. it seems like it would just be additional wear to have it actually *snap* into a docking station. it should just be like the blackberry, where it was a VERY low power magnet, just enough to trip the sensor.