While we wait for the PlayBook to released in its WiFi- and WiMAX-equipped forms over the next few months, RIM's taking every opportunity it can to talk about the platform -- and the latest comes from an interview between FierceDeveloper and the company's veep of developer relations, Tyler Lessard, who played a prominent role at BlackBerry DevCon '10 a while back where the PlayBook was first announced. When asked about RIM's decision to partner up with Sprint and deliver a WiMAX version first before looking at bigger carriers with more broadly-used technologies, Lessard says that they "were reall