I too am still looking for a fix to this problem. The extra sound that is playing before Notifier_Nymph on my 8703e is the "BlackBerry 1" sound from the 7290.
This extra tone also plays when I have the Normal profile set to just Vibrate. So that is annoying.
I tried to work with RIM support but they had to get Sprint on the line to get some information. When they tried to conference the call, they disconnected themselves and I haven't taken the time to call RIM Back.
Hasn't anyone else seen this?