This logo was created to imply strength and a solid foundation through the use of a Roman-style column which gives it more of a "Washington" or "Political" feel. The "light" or "Rays" on top indicate broadcasting or the spread of a message. The orange color could signify fire as well. The triangle in the middle of the rays further symbolizes strength and points upward indicating upward progress.
This variation is a simple orange and gray theme. The "S" and "I" symbol above is almost Asian-looking in a way. The symbol has elements of the letters "S", "I", "Z", "E" and "N" many of which are included in the company name. I enjoy symbolic elements that have subliminal characteristics in them that help make your name stick in peoples minds.