Aside from a standard 3.5mm stereo headphone jack, the N8 features both a mini HDMI and a micro USB port. Not sure what to do with that HDMI port? Try setting a world record.
Buttons include: Power, Home, Hold, Camera, and Volume Switch.
The SIM and MicroSD ports are mounted side by side on the exterior of the phone, allowing for hot-swapping of the MicroSD.