Hi ariesto, My font is based on a commercial font, which was modified, especially "a" which was made from scratch. If you look closely you`ll see that there are slightly differences between the form of the letters, so it`s not a copy of facebook. You`ve asked me for an icon with rounded corners, and I`ve applied this to the font too.
Hey, Here are the 2 concepts from before, and a new one, with the square icons integrated in the grid with all the social media icons. Honestly, i think the best concept is the one with the line under the "b", it's neat, simple, it has a meaning, it's memorable, and i think it looks great, i don't know if i can come with something better that that.