There is no need for virus or spyware software on the iPad. Everything you get for the iPad is through the iTunes store and Apple does a pretty good job of screening the apps. Plus, you aren't running a typical OS like Windows on the iPad.

I did a scan of the iTunes store for virus or spywear software and there isn't even an app available for the either the iPad or iPhone.

With the iPad, you can be fearless.... Enjoy it!