This suggestion spans 3 games so Ima post it here.

When I go to http://www.mariokart64.com/mkw/join.php or the page for 7 & 8, the join info still routes players to yahoogroups. Seeing as you need a forum account to submit times to these games' pps now, these guidelines should be changed, and should include the elusive, specific parser format the updaters need to enter times.

May explain the lack of growth on these two games...