There's a simple solution to this. Assuming you're using informers, or even the $last_news$ works fine, because they have a template adjustment. Using floats. If this is a template for $last_news$, go to Customize Design > Under Site News, go to Appearance of Entries and paste the following code:
Code
<div class="column">
<div class="image">
<img src="imageurl.jpg" alt=""/>
<?$RSTARS$('12','i.png','1','float')?>
</div>
<div class="desc">
<h4>$TITLE$
<span class="poster">posted by $USERNAME$</span>
</h4>
<p><b>Added On</b>:$DATE$<br/><b>Category</b>:$CATEGORY_NAME$</p>
<p><b>Description</b>:$MESSAGE$</p>
</div><div style="clear:both;"></div>
</div>
Now, I'm not up to speed on my css skills right now due to school, as this was made extemporaneously, so if you encounter any problems just come back here and ask. For the rest of it, you should modify the Module Settings for site news to make this appear correctly. By adding a text limit to the description and also the number of entries that appear on a page should be somewhere along the lines of an even number.
Here's the last part you should add in Customize Design > SIte Pages, anywhere you would like to place it. Just so long as it's between the body tags.
Code
<div class="twocolumn">$LAST_NEWS$<div style="clear:both;"></div><style type="text/css">
.column {float:left;width:48%;margin-right:8px;display:inline-block;height:200px;overflow:hidden;}
.image {width:115px;float:left;}
.image img,span.poster {display:block;width:100%;}span.poster{font-size:11px;font-weight:normal;}
</style></div>
The beauty of this is, you can have an array of entry numbers, whether it be even or odd, and it will still be two columns. In other words, it is possible. It's sort of the generic method (my markup used for this particular case), but it does the job just fine.