I currently don't have a functional writeup but the video is posted on metacafe. Here's some noteable information:
What you need:
1 Momentary Push Button Switch
1 L.E.D with housing
1 On/Off Toggle Switch
2 Lead Connectors
1 Project Box
1 Disposable Camera (More if you'd like a bigger capacitor charge- i only use one)
Assorted Wires and Tools
Additionally you need a long two stranded wire (speaker wire works well) and single strands of small cut (3- 6 cm) of steel wool. The smaller you can get it the larger the spark!
Here's the link for the video. Good luck in the project and hopefully you can all use it in your spudgunning success.
A side-note =) Yes its remote detonation in a sense so it looks cool

Enjoy!