E-mail, Web, RSS - you name it! When we publish content, it's pushed out in these various formats. Believe us when we say that our subscribers are THRILLED to receive our information in the format of their choosing. We make it comfortable for them, so that when they see a sponsor's message, they're even more receptive to receiving it. If you care to advertise only through one delivery vehicle (E-mail, Web, or RSS), that can certainly be arranged.
Simply email Chris Pirillo and let him know what you're thinking!