This is just to give you a headsup in case you missed it as I very nearly did: Later this month, Facebook will limit the amount of space you have for your FBML (Facebook Markup Language) page.
You will now only have 520px and somewhere between the 23rd and 26th of this month it will just crop your page to force it to fit that space.
The old width used to be as you'll find on www.facebook.com/sega (and clicking the SEGA GAMES tab). Companies that are already prepared for the change have already slimmed down their pages, and they include the likes of Walkers and Pepsi.
Hope this helps some of you. I've just spent some time pre-warning clients about this!