Here are five findings from iFixit's Nexus S teardown:
Contour Display Doesn't Include LCD
A distinctive feature of Google's Nexus S is the so-called "Contour Display," which curves gently at the edges for a pleasant feel against the ears. As iFixit discovered, only the glass is curved, not the LCD or touch screen. While a press release from iFixit says the name is "a bit misleading," it's not clear what advantage a curved LCD and touch screen would provide.
Easily Removable Battery
No lockdown here. The Nexus S's back cover pops right off, and the battery can simply be lifted from its resting place. Good news if you ever want to replace it.