Regarding the original request, I have one question: While I can see that this might be of use in a few selected circumstances, I am not convinced that this is really useful in a lot of levels. Most of the time, you need one or two of the pick-up skills and then you can place them slightly apart.
Having said that, I have to add: I am not in any way against the suggestion. I am merely concerned that my coding time might be better spent on other features.
@GigaLem: I don't have nice sounds myself, mainly because I am not really interested in them in general. But if you have a suggestion, add the sound file here and if it meets general approval from the other forum members, I will change it.