Considering that Sprint is an official sponsor of Survivor: Nicaragua and the show's app is always listed in the Sprint tab in the Market, it's no surprise that when one of the carrier's phones is used on the island, it's shown off from every angle in multiple scenes.
From a gadget perspective, last night's episode was dedicated to the HTC EVO. We didn't have to rely on the red ring around the camera to identify it like we often do in other shows; it was clearly visible, highlighted, and referred to by name many times.
In case you missed it (or you just don't watch the show), here are some screen caps I took from the episode.
Thanks to everyone who sent in tips about this before the show even aired in my time zone!