Wow.... this thread hasn't been used in a long time. Well, I'm going to give it a sort of update on all the logos we've had since Tom's early temp logo.
This was the early concept I had in mind for how I wanted our real logo to look, featuring the Spino and "DARK SECRETS" as the most prominent words:
Eventually, I created this logo in third trimester of my senior year at high school. It was made entirely with vectors and paths and all that junk, drawn ontop of JP logos and a famous megaraptor painting:
Later on, Trike took my rendering and gave it some very nice texturing.

We wound up with this logo, which was used in early JPDS menus and the original JPDarkSecrets.com web/forum design:
This was a concept drawn up by Chris (DemonCarnotaur), using the website logo, in an attempt to make it more paleontologically-correct

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And this here is the final illustration by Trike, using Chris's suggestions for improvment and going retro with the color scheme, ending up to look quite nice

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