General developer forum

Hi,

I am one of the students working on google summer of code with Moodle this year. My project is blog-style course format (forum discussion , tracker issue). I have been reading the moodle code, and various course formats. One of the issues that my mentor, Martin L, has pointed out is modinfo. What are some of the other possible scalability or performance issues that you guys might think a really long course might have?

Thanks,
Jose