Prepare!

Can you guess what it does?

A#adcolumn_more_ads,
A.ad_title,
A.next_ad,
DIV#adcolumn,
DIV#adcolumn_advertise,
DIV#highlights_ad,
DIV#home_sponsor,
DIV#home_sponsor_nile,
DIV#sidebar_ads,
DIV#ssponsor,
DIV.adcolumn,
DIV.adcolumn_header,
DIV.adcolumn_wrapper,
DIV.ads_feedback,
DIV.clearfix UIHotStory_First UIHotStory UIHotStory_Ad UIHotStory_Medium,
DIV.emu_ad,
DIV.emu_sponsor,
DIV.UIHotStory UIStory emu_sponsor,
DIV.UIHotStory_Ad,
DIV.UIHotStory_Sponsored,
DIV.UIStandardFrame_SidebarAds,
IMG.spritemap_icons sx_ad,
SPAN.sponsored
  { display: none !important; }

Yep, it hides those annoying ads -- typically along the right edge of the screen.

If you're an Opera user:

1. Save this facebook.css file to your local drive.
   
2. Visit Facebook.com with Opera
   
3. Right-click on the page, select "Edit Site Preferences..."
   
4. Goto the Display tab, and click the [Choose...] button.
   
5. Locate the facebook.css file saved-off in step 1.
   
6. Press [OK] to close Site Preferences, then reload the Facebook page.
   

Enjoy.

NOTE: This blog entry has been updated to reflect the new Facebook redesign of March 14, 2009.