I had a quick tour of your source code and I liked your style.
You are so gentle, my coding style is very dirty and rude.

How many people helps you with development?
Nobody nowadays. We had a developer called Dusan that helped a lot, but he make his last commit in July, 2008. We have a modeller called Reginaldo that make some models from time to time. So, pascal developers are welcome

Why do you use the MD2 format?
It's easy to implement, some modeling software support it, and just works. We have a prototype support for MD3, but the MD2 is working anyway.

Why wouldn't you go for skeletal animation instead? I know it's harder, but you don't have to re-invent the wheel and use ready solutions like the SMD format. Or use a file format written by my mate. I'm not sure how well it works, but you might always give it a go.
It's interesting. Have you used this format in some project?