(via Butterfly Photo) has the Photive ML-L3 Wireless Shutter Release Remote
for Nikon Digital SLRS (Replaces Nikon ML-L3) for only $1.99 shipped!
I have not used this remote, but for $1.99, buy a case of them and hand them out to your friends! Technical Details
Replacement Nikon ML-L3
Wireless Shutter Release -Trigger the cameras shutter release remotely from a distance
Compatible with Nikon: D40, D40X, D50, D60, D70, D70S, D80, D90, D3000, D5000, D5100, D7000
Eliminates vibrations caused by physically pressing the shutter release.
Operating range: up to 16 ft