Querying members by membership levels

I am creating a section of my website to highlight featured members, and I thought an easy way to do this would be to create a new membership level "Highlighted" and add it on to the profiles that I want to highlight. In my theme, how can I query members based on Membership level?

I see the M_Member_Search class, but I think that is more for the admin side. Are there any front-end functions that exist already for this?