To make a new Audio Request, click on the big Submit rhino head button at the top of the page.
To record for other users, click the big Record rhino head button at the top of the page.
Recording for other users will move your own Audio Requests ahead in the queue. This will help you get your Audio Requests recorded by native speakers faster.
Moses2010 has an 'accent' on top if his American accent, so learners should be aware of this. I can't tell what it is, though.