Coolpix 5000 has some IR sensitivity, but there is a troublesome "hot spot" in the IR images which likely is caused by internal reflection in the optics. IR image quality isn't great in optical terms either.
The camera engineers obviously try to reduce IR sensitivity of all new digital models, whether they are point & shoot or SLR models. Thus, among the D1-series, D1 has the best IR sensitivity (but with a potentially troublesome banding noise), while D100 is just passable (but with low noise). You are definitively on your own if you want to shoot IR with such cameras, and forget about using the Wratten 87 filter because the CCD isn't responding well enough with this strong filter, use 89B instead.
On the other hand, reduced IR sensitivity means that shooting in UV might be easier and indeed D1H is *the* best digital camera for UV work (in fact, I bought it just for digital UV photography).
I will update my website www.naturfotograf.com with a massive section on digital UV and IR photography in the near future, so stay tuned.