A lot of people have 786 in their username, I thought I'd take the time to clear it up and explain what it means.
In Islam, 786 is meant to be the number of 'bismillahirahmaniraheem' (In the name of Allah, the Beneficent, the Merciful - which is the first verse of the Quraan)
In arabic, each letter has a number
if you add the numbers up, for bismillah in arabic, you get 786.
That is where the number came from.
When A Muslim starts a task, they are supposed to recite 'bismillahirahmaniraheem' as that would Allah to bless the Muslim in question and allow them to undertake the task more easily etc.
It should always be remembered though that 786 is just a set of numbers and has no religious significance.
If anyone feels I have made a mistake, feel free to correct me.
website used for detailed info: hxxp://forum.mpacuk.org/showthread.php?t=14787 (replace xx with tt)
Hope that helps