Luckily Facebook has stepped up in combatting spam, for page admin you'll now notice a grey color on some of your spam post from your fans (see below for several sample of the color highlight, which makes admin life easier in combatting spammer). You can now easily remove post, this is helpful for page with lots of fans to manage and just clean up people that wants to leave their web links or tap into your audience.

With the new Facebook page 2.0 upgrade, if you go into the back of the house for admin you can also now further include the list of keywords you want to highlight as spam and it will automatically highlight future posts. It will not automatically ban the post, but will make admin life easier.