Looks really good.

Always interested to see how people use our service, so some questions back:

• I've not heard of dBoard before. What the backend to this. C++ or PHP? Its just that your approach above of saving a local copy of the image is smart and would be usefull feature that others might want to adopt. Could you post your code to to a new thread?
• Does your forum link to the our Equation Editor? Have you seen our javascript mechanism for firing up editor? With the phpBB option it'll insert [tex]1+2[/tex] directly into your form. We can add an option to produce [latex] tags easily. We're working on plugins for FCKEditor etc.
• What does your forum run on? We're looking to build a world wide network of servers all runing our LaTeX engine, so this becomes a 100% guaranteed service (currently we're 99.2%, due to recent disruptions). So if you have spare CPU cycles on a Linux box with public access, then let us know. We'll provide the LaTeX system for free including support, In return you'll have to allowing others to render equations from your machines. There will be load balancing across all servers, with most work done by us - so you shouldn't notice any degregation to your forum + plus you'll get all new features first.

As for the offtopic stuff. You can produce Diagrams using xymatrix, i.e.

Once we're confident v3 of our engine is running perfectly, then we'll also switch on other LaTeX options like xygraph.

As for the other stuff you've say you seen alluded to. I'm affraid you'll have to wait - we've some utterly amazing stuff due to be released shortly, which will do everything and far more that you perhaps image. And yes it will be just as easy to integrate into your forum.