Just so that you know, though, don't expect any improvement in tactile feel, or any improvement in noise level. The DS Lite Rumble Pak uses the exact same motor as the regular DS version. It just seems to be that the circuitry around the device is much more compact. (There's gotta be a way to mod in a regular motor, though, no? Like what came with Drill Dozer?)
That said, though, I'm glad I can finally have a bit of rumble without the cart jetting out out the slot, as it looked with the regular pak. As far as usage for a Rumble Pak in general goes, I agree that it's awesome for Elite Beat Agents -- and Star Fox Command also uses it pretty decently (though, it's kinda weird how it starts to sound like old PC Speaker sound effects).
[ What Nintendo should've done from the onset, though, was to make those emtpy GBA slot covers for the DS Lite into Rumble Paks. That way, maybe more developers would've incorporated its use into more games. ]