Hi Krash,
Many of the questions you ask are not strictly limited to the Coolpix, they apply to ALL underwater digital photography. So, you might want to repost that question with a different subject besides my name...
I'm sure that others have valuable input here besides myself. I'm pretty much a beginner too remember, when it comes to digital UW, we ALL are.
As such, I can tell you a little about my setup and where I bought it. Here is a picture of my housing setup:

I got both strobes on Ebay and the rest from Helix (www.helixcamera.com).
Read this link for more info on strobes:
http://www.wetpixel.com/forum/viewthread.php?tid=219
What sync cord you use will depend on what strobe you buy and your taste. Nikon, Ikelite, and Sea and Sea all make them.
The wideangle dome port is something Ikelite is making to accomodate the EXCELLENT Nikon 19mm lens. To use this lens w/ the Coolpix5000, you will need the UR-E5 adapter ring made by Nikon. It is harder to find than the treasure of the sierra madre. The lens has over a 90 degree field of view btw, I can't wait to try it underwater!
Cheers
James
[Edited on 4-16-2002 by jamesw]