Code pasting

If you are a programmer and you wanted to send chunks of codes to someone, chances are you'll use email or IM...and chances are they'll be ugly, badly indented, missing line-breaks, etc.
When I was at college, I ran into this site where you can post your code for free and get a URL out of it. It will preserves line-breaks & indentations, give it line numbers, and best of all, it has built-in syntax highlighting for popular language from C++ to Ruby.
Check out RAFB's Paste()