In Arabia, the greeting is associated with shaking right hand and then possibly two or three light cheek to cheek kisses (only between the same gender).
In Iran, the greeting is accompanied by a kiss. The way Iranians say As-Salamu 'Alaykum is a simple Salaam. This means Peace, and is used similarly to "Hi" in English-speaking cultures.
In Pakistan, the greeting is often accompanied with a nod of acknowledgment and a hug when meeting infrequently between the same gender. In Bangladesh and in some parts of Pakistan and India, the greeting is accompanied by raising the right hand to the forehead (arz hai <"regards">).
In Indonesia, the greeting is usually accompanied with a kind of two-handed "handshake", whereby the shaker's palms remain closed, and the fingers alone open to admit the other's proffered hand- which briefly touches the proffered's fingers or fingertips alone. In this way more adherent males and females may greet though touching- but remain true to the Islamic or cultural teachings forbidding physical contact between the genders. Occasionally, the right-hand will touch the left-breast or heart area after this "salem".
In Javanese culture, a remnant of feudalism is retained, where an elder's proffered right hand is taken and pressed briefly against the forehead. Some may instead briefly kiss the hand or the main ring. This is very common for young children to greet older relatives (of their parents' age, though on occasion if very polite children, younger). As per Turkey, "slm" is common for teen "SMS" or internet speak.
Some more pious Muslims may say "Selam" and then perform two very brief cheek kisses, or cheek brushes- but only among the same gender.
In Turkey, many Turkish use this statement and hugs each other, more secular and non-religious people, say "Selam" as an equivalent to "Hello" or "Hi". This use has extended onto the internet with the abbreviated "slm" being commonly used amongst Turks on social networking websites.
In Amharic , the term "Selam" is used in place of "Tadias" which is the equivalent of "What's up". The word "Selam" has the same meaning in Amharic as in Arabic which is "peace".
http://en.wikipedia.org/wiki/As-Salamu_Alaykum