I registered for a bunch of languages and the Spanish and French ones would always seem to get filled up quickly. But then last month, there was a need for Tagalog learners (I am native or heritage speaker) so I signed up and did a little interview. The interviewer asked about my background, my favorite memories from childhood, a political issue in Seattle, and some role-playing (this involved me being stranded in a Manila airport). That interview went smoothly. I got my $25 check a few weeks later.
Just today I did another interview for Cebuano, another Philippine language - but my skills in that language are very basic. But they want learners of all levels. Our interview was consequently shorter than my Tagalog interview. I was a little overwhelmed at times by what he was saying - but he was kind enough to slow down. We did the background questions and roleplaying (this one was getting reservations). The difference was that he took out the political question thing since I lack the skills to do that, but he allowed me to ask him questions about himself. Our interview was briefly interrupted by a fire alarm that went off in his building, though.
So yeah, if you're interested, go to this page and sign up - evaluating your language skills. And you basically wait till they e-mail you. It's fun if you've been wanting to practice a language you've been learning and plus you get a little cash on the side. :-D