First is the most important for me, what changes if something becomes sticky? And the second is : I got more then 30 post and I'm still lvl 1 user. How fast do they change that?
A sticky is a post that stays up toward the top even when its not acitve any more. When you have posted over 30* posts, and a moderator or administrator noticed you have been helpful, you will be upgraded to level 1 and will receive 10 download points.
By the color of name... look at bottom of page on the index (main page) it will show you all the colors and what they are.