Here's a link to the LEDs I bought.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110683425679#ht_2565wt_1139
I just bought 20 more from this seller, but the shipping and handling charges were 1.39 PER light, so instead of $25 for the purchase (like I assumed), it was $48. They don't combine shipping. Oh well. $48 is still a great deal for all these. I'm sure I"ll have some spares left over that I'd be willing to sell if you don't want to wait a month to get it from China.
***DISCLAIMER*** I have not tried these as rock lights, or underwater. All I did was connect it to my battery to see if it was bright or not, and it surprised me how bright they were. They're at least twice as bright as my tantrums. I actually trust that they'll be more waterproof than the tantrums as well. I plan on using them in the interior of the vehicle as well as in the truck bed area, under the hood, and as rock lights. I doubt they'll be as good as a cheap set of HF halogens for the rocks, but at least they won't draw too much power. It'll be fun to experiment with them.
If anyone decides to get a few, hit me up so i can see how you're going to use them.