So I'm busy with this real simple coming soon template, and now I need to make a horizontal dash. I refer to the picture at the bottom of this post. Is there any way in HTML or in CSS to do this?

So I'm busy with this real simple coming soon template, and now I need to make a horizontal dash. I refer to the picture at the bottom of this post. Is there any way in HTML or in CSS to do this?

kind of a hacky solution, but you can use dashes (or longer dashes like in my case), reduce the letter spacing on the dashes, or use a font with no space between the characters to put them next to each other.
HTML
<p>――― <span>Coming Soon</span> ―――</p>
CSS
p { font-family: Arial; letter-spacing: -2px;}
p span { letter-spacing: 2px; margin: 0 5px; }
example fiddle: http://jsfiddle.net/D5nA2/
The character you want to use is the "em-dash", HTML entity —. In typesetting it is defined as a dash that is the full width of the widest character in the font (usually the letter M).
If you string several together in a row, as in ———— (4 em-dashes) you can make a dash of whatever length you want (in increments of M widths).
In variable-width fonts (where each character can have a different width bounding-box) there's also the "en-dash", –, which is defined (in typesetting) as ½ the width of the em-dash. Here's a string of 4 en-dashes: –––– Of course the en-dash won't join up into a solid line in fixed-width fonts.