If you find a problem with Mega-math, or if you have a question or comment, you can send us mail. Please note! The developers of Mega-math have left the project, there is no funding for it, and there is no ongoing development or maintenance (sad but true). As such, most mail will likely go unanswered and only major problems dealt with. We're sorry to sound harsh, but the bottom line is that no one is working on Mega-math, much less the people who created it. Please don't ask us for help with homework problems and things of that nature.
If you'd like to find more info about math links on the Web, especially in a K-12 context, you should look into Science and Math Initiatives (SAMI). Yahoo also has a category dedicated to math with tons of links.