Help Formatting Blog Page Using CSS

Hi,

I have been working on formatting the page below using CSS:

http://www.thetechstore.co.uk/index.html

I'm working on integrating a blog into the site using blogger, feedburner and buzzboost

There are still some things that I can't work out how to do. Hopefully someone can help!?

1. I would like some white space between the end of an article and the start of the next article
2. I would like to make the dotted line under the title extend to the width of the page (not just an underline)
3. I would like this dotted line to also appear at the bottom of the article
4. I'd like to know how to change the styling on the Digg, Del.icio.us, links at the bottom of each article

CSS Code is attached below:

Thanks in advance!

<style type="text/css">
 
div.feedburnerFeedBlock ul { 
padding:50px;
margin-right:50px;
margin-left:50px;
list-style-type:none;
font-family:Geneva, Arial, Helvetica, sans-serif;
font-size:medium;
color:#333333;
}
 
div.feedburnerFeedBlock ul li span.headline { 
font-weight:bold; 
letter-spacing:1px;
font-family:Geneva, Arial, Helvetica, sans-serif;
font-size:x-large;
border-bottom:1px dashed #ccc
}
 
div.feedburnerFeedBlock ul li span a
{
color:#FF9900;
}
 
a:visited {
	text-decoration: none;
	color: #999999;
}
a:hover {
	text-decoration: none;
	color: #333333;
}
 
a:link {
	text-decoration: none;
	color: #ff9900;
}
 
#creditfooter
{
display: none;
}
 
</style>

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