cool good idea i havent got any good ideas for a website but if you want i can make some flash movies for you not loads (thats what i do for a hobbie
The first, as you mentioned, is a trick database. Yes, it's been done elsewhere, but as I doubt anyone will ever produce anything definitive, there's always likely to be room for something that fills the gaps.
Secondly, you could make a database of diabolos themselves. Commercial ones, historic ones, custom ones, whatever. I'm not sure quite how interesting it would be, or where you'd get the information from, but I've not seen anything like it elsewhere.
Lastly, I suppose a database of diabolo players (or whatever you want to call them) could be compiled, along with photos/videos and other information. Something tells me this could be something of a 'can of worms' if not apprached with care, but it's still an idea.
i can make some flash movies for you not loads (thats what i do for a hobbie
Why don't we just set up a diabolo wiki for a trick database so everyone can contribute and make it better.